Note that a lot of truck campers - especially the big ones with slides - are carrying a lot of weight centered fairly high up off the truck's suspension and frame.
This makes it top heavy enough so as to be real tricky on canted (tipped sideways) road surfaces getting to and from camp sites. Of course if you offload it at a camp site, this is not an issue when running around in the truck while camping.
Due to this center of gravity issue, I'd only use a pickup based rig similar to this one for 4X4 offroading - it means having your home with you all the time so you don't have to return to it at the end of the day:
![](http://i226.photobucket.com/albums/dd1/tpgnsc/ProvanPop-Top.jpg)