MCMAHON RV. Come and visit us today at one of our four California locations: Irvine at Traveland USA,Colton at the American RV Expo, Mc Mahon's RV Palm Desert Just past Palm Springs in Palm Desert, CA., And Mc Mahon's RV Santa Cruz in Scotts Valley, CA. You can also visit us online at www.mcmahonrv.com MCMAHON RV - Home to the World's Finest Motorhomes and Towables.