Not completely unrelated. I am using an old truck bed trailer to support the camper when not on the truck. This doesn't help when out on road, but my camper is a palomino and not designed to be used off truck. Although I did in summer of 2013 for about 5 days when my truck was getting worked on, not much choice. I think I used cinder blocks on each corner but not much else.
We have a camping lot at a private lake with a 25ft 5th wheel. The truck camper is for traveling. occasionally we need a "guest house" and the truck camper does just fine on the truck bed trailer. If we need to move it around the lot, again the trailer does just fine.
just food for thought.