I bought 2 sets of sheets and a mattress topper
Had a seamstress sew the topper and fitted sheets to enclose each raised back
So put the topper and fitted sheets on from raised back ends first then pull down
Easily done.
Was looking for a RV with a full size bed and found an abundance of twin bunks
Some like the Roadtrek offered a bed comprised of a bunch of cushions thrown together
Our last RV of 8 years was a Rialta with a Full size bed and we were spoiled
Yes both sides of mattress raise for sitting up, a ratchet system
Winnebago Trend is awesome