I just finished putting 2 sheets of plywood between the rails. The first layer puts up against the Reese rails where they hit the bed floor. The next layer is bigger and buts up against the side of the Reese rails. Now when i throw a rubber mat in the truck it will cover the plywood and the rails in 1 full piece.
I like the idea of the foam insulation, but for the first trip I have to drive 6 hours without the tailgate to pick up the camper. I think the foam would blow out even with a rubber mat installed.
2022 Ford F150
Sold: 2016 Arctic Fox 990, 2018 Ram 3500, 2011 Open Range
Sold Forest River Forester 2401R Mercedes Benz. when campsites went from $90 to $190 per night.