Just Jeff wrote:
Get a TC and mount it on a trailer, then enclose the part under the cabover as storage. You can use it as a TT with storage when you want to, and put it in the bed when you just want the TC and don't need the extra space.
That is what I did (but I didn't enclose the front) and now I have 100# of LP, 20 gallons of extra gas for the quads or generator, 80 gallons of water and a 30,000 btu outdoor stove. Besides, I can always put the camper on my 1 ton truck if I want to. (probably will never happen)
It actually tows quite well. I have had it on 4 trips of well over 250 miles each. In a few weeks I will be taking it on a 5,000-6,000 mile trip.