I got volentold that im bringing 4 bikes instead of my usual for our camping trip. short box f150. lots of payload. just concerned about physical space. no rack, not going to have a rack. whats the be...
In our travel trailer days, I just put a couple 2x4's across the bed in those slots they provide so you can haul a 4x8 sheet of plywood above the wheel wells. I then used these to tie the bicycles upright. Handle bars opposite directions. They'd shift a little, but it worked well for only the cost of a couple boards, a few holes drilled for tying, and some light rope or cord.