
I ordered a tent from Benehike, but dispite it appearing to be a California based company (and supposedly shipping form Cali) the charge went direct to a Chinese company. I received no further communication for weeks after the initial order so I had to dispute the charge.
I ended up ordering a TentBox Lite XL shipped direct from Amazon. Looks like they are a UK company and are heavily pushing the product over there. They offer other accessories like a cold weather liner that has me scratching my chin (The wife might go for that). The tent arrived today, but freezing rain this evening so I covered the box with a tarp for now. I'll mount it to some cross bars over the truck bed so we can get familiar with it this spring while building up the trailer.
I found Menards carries 1/4" UV stable HDPE in 4'x8' sheets (white or black) for a very reasonable price. 10lb lighter than an 1/2" ACX sheet. I think I'll build up a metal skeleton over the trailer frame to rivet or screw plastic sheet sections to. As long as the steel is painted there should be little issue with water ingress compared to wood products. Not ultralite construction, but the tent is only ~165lb and I have 1400lb total spring capacity to play with. I've towed aprox that weight from Cinci to Denver and back with a 1.5l so I know the worst of it. https://i.imgur.com/GEZjdZc.jpg