A buddy of mine owns an M35A2 and he has a 'poptop' camper in the bed of his deuce. When the camper poptop is down, you can't TELL it is inside the truck bed with the cover on. He modded the rails that hold the bed cover in place. He measured up how high the trailer 'pops up' and then moved the legs up and drilled a hole in them so he slides a pin in each leg at the correct height.
And the cover is long enough that it still does not allow you to see it's there and the cover is still attached to the bed. He doesn't drive it around with the poptop UP, but once parked, he raises the legs and pins them in place and them raises the poptop up.
This gives him a space to sleep four, A/C, TV, semi functional kitchen. Plus a portatoilet that personally I wouldn't use. But if camping and parked during a heavy down pour or snow storm, one MIGHT actually use the potty inside the pop up camper instead of 'finding a tree or digging a hole' if you get my drift.
It works very well and he's super happy with the setup. Plus with either a tow motor or a small cat with forks he can (and does) remove it from the bed during the spring/fall/winter months and his deuce is just a deuce. But during the summer it's a 'camper deuce'.
I think the idea is sheer genius.
I used to have pictures but can't find them right now. If I do, I will post them.
Yes, he is a member here, but I don't say who without telling him first.