Back when I was sleeping under the cap of my pickup I used a Coleman air mattress and found it very comfortable. I'm not sure I'd want one in the TC unless I was sure to carry spares, and even then... One thing I made sure to do was leave some air out of the bed each morning when I was traveling. A few thousand feet of elevation change would be all that's needed to turn a good mattress into a leaking mattress, and going to sleep on what you think is a good mattress only to wake up a few hours later to find it's a leaking mattress is not conducive to a good night's sleep.