Skyjim, I don't like the foam mattress, either. So, I got an air mattress system from
Coleman. I had to get a piece of foam cut to run along side the DW's side, as there was about a 4" gap between the mattress and the edge of the bed frame, but it is easy to adjust the firmness of the mattresses. I run them cross-wise, so it is not a mattress for her and a mattress for me, but it still works. We have a 3" egg-crate pad on top. I deflate for travel, inflate in about 3 minutes after arrival (
cheap portable inflator). Can close the TM with everything in-place (deflated).
Just a suggestion, as it works great for us.