If you want a cool RV, check out the Earthroamers--Ford F-550 diesel crewcabs with a built-on camper back. Fully equipped for off-road with 37" tires, 4.88 axles with limited slips, full diesel powered accessories for the camper with battery backup, massive water tank, full appliances, serious heat and A/C, beefy winch bumper, and on and on. These things are about as cool as an RV gets--goes just about anywhere, and takes it all with you!