5 inches of foam board in bed?

I like the idea of another cross member or 2. I plan to liquid nail the frame to the camper when I set it on with a few screws. Thanks all.

I think I would have tried to build in some slide out drawars or something. Seems to me you could use all that space for storage.

I would add a couple more cross members and at least a rubber surface to the top of the frame to keep the camper from sliding. I would add a sheet of ply and a rubber mat myself.

I Went with a wood frame. We will see how it goes..

We have an old Palomino Mini L on a F-150. We use (from bottom to top) a rubber horse stall mat, 2 layers of 2 inch foam board, then 3/4 inch weather treated plywood.

Works great for us, very minimal shifting even on crazy steep winding roads, easy to take out when offloading the camper.

I don't like the sound of 5" of foam board. Go with a wood frame and a foam board topper.

Your correct Skip, mini truck camper in a mid sized truck. I don't want my wings resting on my bed rails.

Yep, that's the problem. Check out his profile & pic.

Personally, I would build the platform with 2" x 6" lumber.

You are saying your truck's bed rails are 4.5" taller than your camper?? What truck and what camper would that be?

Sounds like a camper for a mini truck camper in a full size truck bed maybe?