RV Picks

3 Travel Trailers with Surprisingly Large Holding Tanks 

Lynne Fedorick
Published: August 25, 2026 Edited: August 28, 2026
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Motor home under big tree on campground by the lake in the evening

RV boondocking has surged in popularity in recent years. Crowded campgrounds and rising fees at traditional campgrounds are compelling more people than ever to camp completely off grid without water, electricity or sewer hookups.  It doesn’t take long before they discover that RV holding tank size can dictate how long you can stay off grid.  Obviously, bigger holding tanks allow you to camp longer.    

But contrary to popular belief, you don’t always need a big RV to enjoy the benefits of large holding tanks. There are plenty of well-designed smaller RVs that have surprisingly big holding tanks.  Let’s take a look at 3 travel trailers that have huge freshwater and wastewater tanks.   

Oliver Travel Trailers Legacy Elite II 

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 The Oliver Travel Trailers Legacy Elite II travel trailer is a luxurious, yet lightweight travel trailer that’s easy to tow with a half-ton truck or large SUV.  The double hulled Legacy Elite II is designed for year-round use, on or off grid.  At nearly 24 feet long, it’s not a tiny trailer, but it’s sized right for a couple.   

Weighing in at 7000 lbs, there’s nothing flimsy about this hand-built travel trailer. Oliver hand builds each Legacy Elite II on a durable aircraft grade aluminum frame. The chassis boasts both leaf springs and gas shocks as well as a Dexter E-Zflex suspension to help smooth the ride, so you can tow confidently whether you’re headed to BLM dispersed camping or grabbing a site alongside a national forest road. 

The fresh and grey tanks give two people the ability to for up to 10 days at a time without having to refill and empty tanks. And if you do need to use a tote to empty the black tank, at least it’s a manageable weight at under 150 lbs. Inside, the Legacy Elite II feels very high-end. Hardwood cabinetry with dovetailed drawers sets the tone throughout. Here’s a list of the most outstanding features. 

Noteworthy Features 

  • Electric jacks and dual axles for easy setup and stability 
  • Electronic tank valve controls 
  • Hidden storage space for waste tote 
  • Rear dinette converts to a king bed 
  • Off-grid power package: 400W solar, 390Ah lithium battery, 3000W inverter 
  • 15,000 BTU air conditioner 
  • Power awnings on both sides with bonded dual-pane awning-style windows 
  • Spacious wet bath with porcelain or composting toilet 
  • Kitchen features stainless microwave, 2-burner induction cooktop, and 12V refrigerator/freezer 

Specifications 

  • Sleeps: 3 
  • Seats: 7 
  • Length: 23.6 feet 
  • Width: 7 feet 
  • UVW: 4,900 lbs 
  • CCC: 2,100 lbs 
  • Tongue weight: 490 pounds 
  • Fresh/Gray/Black: 32/32/15 gallons 
  • MSRP: $85,000 

Northwood Arctic Fox Edge 22GT 

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If you’re looking for a smaller 4-season couple’s camper for boondocking, but you want to keep things simple, the Northwood Arctic Fox Edge 22GT could end your search. This travel trailer simplifies camping with a slideout-free design that still feels spacious inside, owing to widebody construction. 

It offers everything necessary to be off grid for extended periods, including astoundingly large holding tanks for a trailer its size — enough capacity to last two people up to a month of boondocking. There’s plenty of hot water for showering, washing dishes, or washing the dog in the outdoor shower. On top of that, the Edge 22GT is filled with enough luxuries to keep you comfortable while you’re off grid. 

Northwood is renowned in the industry for building well-appointed, rugged, four-season RVs, and the Edge 22GT is no exception. With its robust insulation package and gas furnace, it’s ready to boondock whenever you are. 

Noteworthy Features 

  • Dual axles with CRE 3000 MORryde suspension 
  • Widebody aluminum frame construction 
  • Generator prepped and satellite prepped 
  • Solar package: 3,000W inverter, 400AH lithium battery 
  • 10 gallon gas/electric water heater 
  • In-floor heating and gas furnace for four-season comfort 
  • Walkaround queen bed with storage underneath 
  • Spacious shower with skylight and porcelain toilet 
  • Durable solid surface countertops in kitchen and bath 
  • Kitchen features 10 cubic foot refrigerator, 3-burner gas cooktop and oven, and microwave 
  • Extensive storage throughout, including front pass-through cabinet 

Specifications 

  • Sleeps: 4 
  • Length: 23 feet 10 inches 
  • Width: 8 feet 6 inches 
  • Height: 11 feet 4 inches 
  • Dry Hitch Weight : 900 pounds 
  • Cargo Carrying Capacity: 3,855 pounds
  • Gross Dry Weight (approx.): 6,545 pounds
  • Gross Vehicle Weight (GVWR): 10400 pounds
  • Fresh/Gray/Black: 100/42/35 gallons 
  • MSRP: $84,481 

Outdoors RV (ORV) Creekside Mountain Series 17RBS (Titanium Package)  

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Are you searching for a unicorn couple’s RV that’s towable with a half-ton or SUV, but is also loaded with luxurious amenities? You’ll want to put the Outdoors RV Creekside Mountain Series 17RBS on your radar. It’s a perfect choice for both boondocking and road trips. This easy towing travel trailer packs impressive off grid amenities and a long list of noteworthy features. 

Outdoor Recreation doesn’t sacrifice quality for light weight either. Everything in these RVs is built with off-grid use, durability, and year-round camping in mind. Off grid capability in the 17RBS begins with astonishing tank capacities that rival those on much larger trailers.  

To meet the power needs of boondocking, the Titanium Edition offers more than enough power to run both 12V and AC appliances. The Series 17RBS comes fully prepped for Starlink too, keeping you connected to the outside world. Additionally, these trailers offer advantages for year-round camping. 

Noteworthy Features 

  • Custom-built off-road chassis with 4X4 suspension and 2-inch aluminum frame construction 
  • Heated and insulated enclosed holding tanks with thermal pane windows and 12V tank heaters 
  • Push button remote stabilizer system 
  • 15,000 BTU AC and 25,000 BTU gas furnace for year-round comfort 
  • Extensive storage in raised panel solid knotty alder cabinetry, plus pantry storage 
  • Solid surface countertops 
  • Full sized farmhouse-style kitchen sink with covers and gooseneck faucet with sink sprayer 
  • Kitchen features 8 cubic foot 12V refrigerator with separate freezer, 3-burner gas cooktop, and 17″ oven 
  • 12 Volt LED smart TV 
  • Front 60″x 80″ queen bed with premium gel foam mattress 
  • Corner shower in bath with easy-to-clean porcelain toilet 

Specifications 

  • Sleeps: 3 
  • Length: (hitch to back ladder) 21’10” 
  • Width: 7’ 6” 
  • Dry weight;  5,250 pounds
  • Hitch weight: 500 pounds 
  • Cargo Carrying Capacity: 1,750 pounds 
  • LPG capacity: 2x30lbs 
  • Fresh/Gray/Black: 78/40/40 gallons 
  • MSRP: $66,883 

You Don’t Have to Go Big to Go Off-Grid  

 You don’t need a big trailer to go off grid in a big way.  When it comes to boondocking in an RV, smaller travel trailers are where it’s at.  These compact, yet well-appointed travel trailers simplify life, offering the freedom to camp in places where larger RVs just won’t fit.  All 3 of the RVs mentioned in this article, are equipped with a full complement of all the luxurious amenities you’d expect to find in a much larger travel trailer. 

This includes huge holding tank capacities that rival (and sometimes double) those found on large RVs. This makes them a perfect choice for road trips and/or boondocking, wherever your camping journey takes you. 

Lynne Fedorick's profile picture Lynne Fedorick
Lynne Fedorick is a freelance writer and RV expert. Lynne has been an avid and enthusiastic RVer for more than 35 years and writes for many RV magazines. She travels throughout North America in a Class A RV with her two dogs. Be sure to check out Lynne’s RV adventure blog at RPod Adventure.