I camped in a truck camper since 2006, but gave it up recently for an R-POD trailer. Not a real off-road trailer, but with the off-road tires and axle risers, I haven't a problem yet pulling it around the local desert. I really like dropping the trailer at the campground and then go off exploring as opposed to always hauling a 2,000 pound camper in the truck.
There's a good RPOD forum that has a lot of info:
http://www.rpod-owners.com
My RPOD at Joshua Tree NP: