With a lifted truck like that, it'd be an adventure loading and unloading that puppy, let alone driving around with it. The make a gooseneck to plant it on sounds like a real good idea, or something I've seen a few guys do around here, which is cheaper than buying the parts is they buy a clapped out small gooseneck stock trailer and take the hot knife to it and cut off the top, then bolt the slide in camper down to the stock trailer frame. they've got a nice sturdy 2 axle gooseneck setup that way that pulls through the woods easy.
I had a 12 ft slide in job years ago. that thing was a beast, I even had a little removable tag axle made for it that went behind the rear drive axle to help steady the monster. It was made with one of those torsion bar trailer axles and the tires poked up inside the fenders under compression . That truck didn't have a 1000 pound engine up front to help balance things out, but the camper was right comfortable. The dang overhead bed was a full queensize