I have a concept in my head now that I think may work.
It may require building everything myself but I think it may work for a multi purpose expo trailer.
If I can find or built a camper that I can lift I will build a trailer to suit.
What I would love is just the camper from JJBigg's build a lift and trailer to suit my idea. Something like this on the trailer which will also assist with utility dutys as well.
I think a lift like this could easily lift off the camper and place it back on the trailer when needed. This way I could easily place all my camping gear in the trailer and be ready to go at the drop of a hat. I could also use the trailer in the fall when I need to get 8 cords of wood or pick up an engine to work on or out hunting place the camper pick up game and then take the game home and come back to pick up the camper. I could even do this now on my car hauler but it is a bit too long for off-road duty.