Hi Peggy and Norm,
A couple of other questions for you:
1) How tough was it to fold the mattress to fit it in the trailer?
2) Did it change how much area you had for your feet at the base? One reason we're leaning away from any major padding is hubby has size 13 feet...would make it a tight squeeze unless he turns his legs.
If we did swap out mattresses, I wonder if it would change how the couch sets up since it goes over the mattress a bit to rest on the pegs...would depend on if it were thicker than the current one. Good luck finding a buyer for your cover.
Thanks!
Stelena