If I were doing one I’d be tempted to use a side-door camper so I could get in without unloading the trailer. But then I’d lose the “back porch”. That’s a tough choice.
Not as criticism but pure curiosity, I have the same quaestion as others, why not set the camper on the truck and pull a flatbed trailer behind? That’s what I do, the advantage being less total weight and more trailer deck space. With a Stable-Lift camper lift on it, it’s super easy to load or drop the camper, which makes it comparable to a trailer in that respect.
My main modification was to stretch the trailer tongue four feet so it can hitch directly to the truck, instead of using a four foot hitch extension. With a 10,000 pound trailer I feel this is a whole lot better.
This gives me 7500 pounds of usable capacity (the trailer itself weighs 2500) on the trailer deck, and the full 20 feet of deck.