Mine is designed more as a base camp trailer, it has every creature comfort you could imagine. I feel I can do most trails with mine, my truck is an automatic making it much easier on osbtacles plulling a trailer. I also have lockers front and rear and a good winch.
Watching your video's the only one that I would not attempt was the squeeze one, my truck is a good 6 inches wider than yours OUCH.
I use action packers with foam in mine and they are in a very tight compartment. I also have the ability to carry more on the outside of the trailer, tied down with ratchet straps. Inside the TV and Stereo, Micro Wave, oven are all attached permanently.
Clothing would be the only thing that would bounce around that and sleeping bags if used. We are converting to Action Packers for suit cases and the like, as they can be removed from the trailer and placed under it when sleeping. I will make tie downs for those shortly. Figured that out last weekend.
I will be building more of the box trailers, but for sales I think there is a much larger market for a capable off road tear drop than the AT type trailer, there are only so many of us that do it. The tear drops appeal to the off roader and the highway crowd, the box trailers not so much.