The frame was 7 feet wide X 16 feet long. I cut it down to 7 X 14

this is the frame painted (upside down)
I wanted to build the camper with 1/4 inch plywood on the inside, 2 X 2 uprights, 2 inches of insulation, then cover the whole thing with canvas.
That's why I called it a "Hybrid"

This is the floor, The drop section is the only place tall enough to stand up in (6 feet)

I glued the curved bracing off of the trailer for ease of handling

Until it is all assembled everything is a bit shakey

The sides starting to take shape. I used a minimal amount of upright bracing. The foam should give it the support it needs.

I did use more bracing at the front and rear curves to "convince" the plywood to stay where I wanted it.