K-Z Fifth Wheel in Birch Run, Michigan : It started with building truck campers in a small gas station in Middlebury, Indiana. From the first camper built by Daryl Zook in 1972 to the broad KZ line offered today, there is one feature that has always come standard... they're people! KZ was founded on the principles of fairness, courtesy, and quality. These principles are still carried on today. KZ Recreational Vehicles, a proud history and strong future, all built around on one common assett, the members of the KZ family.