OfficerImpersonator
Seattle-area Rounder
Randy-
Not to rain on your parade, but I'd check out that REI mattress by sleeping on it at home a couple of nights before you take it on the road.
I had two of them that I bought on clearance from REI a couple of years ago. One leaked right away, the other lasted several minutes before leaking.
I went back to my old Therm-a-Rest, which has several years under its belt- with no leaks!
I sincerely wish you well with the REI mattress, and I hope it holds up for you for years to come. I liked everything about the two I bought, except their inability to hold air!
Therm-A-Rest makes the REI-brand self-inflating mattresses.