[Scott2]

Again, great fabrication and it looks awesome!

Regarding the sealing - with my trailers and campers, I think most of my sealing issues came from the flimsy frame and the camper moving, twisting and shaking while driving, especially over bumps and bad roads. The roof seams on my previous 20' trailer kept loosening up and the roof vents would start to leak so I was always up there with caulk and elastomeric coating. I would think that with your really solid base of the truck bed you will be in much better shape, you just have to keep the upper part from wagging around too much.

I see a couple of diagonals - of course more of those will help and I would think even some triangular gussets where the roof and wall tubes join would add a ton of stiffness for that edge joint. Of course, built-ins could also brace it up very well. Good thing you have that nifty lifting system to get it on and off the truck!

Have a great trip!