First, are you sure a 10’ wouldn’t fit in the elevator (lower corner to opposite upper corner)?
Second, you might consider an Advanced Elements inflatable.
I have the Lagoon model (which I’m trying to sell locally because it has a leak):
Only 16 pounds!
Not much storage space for camping gear
Doesn’t dry out (if you live in a high-humidity location)
Possibility of leaks (I got mine used).
There are other AE models that might work better for you.