Raising camper height...wood/foam/rubber etc...

The high density foam board has tremendous PSI capacity and weighs next to nothing. It makes ZERO sense to me to haul around extra lumber. I have been using the same 4 pieces for 5 years with zero compression. It also makes a great loading aid; I have a piece of tape on the center of the front of my TC and the foam is 2x8 so it has a nice center line to load with. My only regret is buying the pink stuff from H Depot when I could have had blue from Lowe's. It really does not need to be complicated.