What forum is best for converted tractor-trailers?

Cool ideas. Why not try to use a car-hauler trailer, like the ones used for moving antique autos. Should be available and would make an easier conversion due to rear doors set up for loading.

Old semi-tractors are beautiful. Even if you just use as a tower, having that vehicle would make you the hit of a campground. Maybe not with some of those picky owners though.