First tip of all, Get a Mattress Topper
Sleeping on the provided Aliner couch cushions probably never thrilled anyone. Camper couch cushions are durable, not soothing. The good news is that all you need to make sleep better is a mattress topper, and a three- or four-inch one will fit nicely below your Aliner“s fold line.

Photo of the bed end of an Aliner Scout, showing a cabinet
to the left, a counter to the right, and the rear bed in back
with two colorful pink, yellow, turquoise, teal and blue
duvets tossed over, under a picture window.
In cold weather, a the most popular foam toppers will stiffen, but they warm up quickly with a human body or two lying on top.
Other ways to make your camper bed easy to live with follow: