We too gave away the OEM mattress - truly a POS. Opted for the aero bed with a memory foam topper. Worked great for about a year. This last weekend, got a very small slice in the bottom of it so spent the remainder of the night on the memory foam topper and the wife on the sofa.
Went to Slumberland in Lake Ozark and picked up a euro-top Serta and horsed it in to the space. Niiiiice!
As far as that upper "bunk" is concerned, we got some bins at WalMart and use it for storage. Added the under bed w/ a nice cabinet door too, handy for larger items like umbrellas, larger lawn chairs and winter bedding. LOVE IT!
Welcome to the Board! Have fun, ennoy the trailer. '
...campin crazy this summer