I guess my post was not very clear. We don't use memory foam in our HTT.
We just use the mattress topper, with the electric heater embedded, that came with the beds. They do a pretty good job for us.
We use 4" memory foam on top of our PopUp mattresses. No, I can't close the camper up with the foam on top of the mattresses. I put them in the back of the F-150. I wish now that we had purchased 2" memory foam.
Me, DW and 5 dogs
2004 F-150 Reg Cab,Long bed 4X4
2008 Flagstaff 625D Pup (keeping this one for now)
2010 Jayco EXP 21M Hybrid
ďThis isnít rocket science; itís more like quantum physics.Ē