We haven't spent any length of time in it yet, unfortunately. An overnight in the driveway led us to the conclusion that we will put a memory foam pad over it. Although I don't personally have experience with doing that on a trip, I got a message from a woman who had put a foam pad on her bed and said it folded up all right for them. Hope that helps.
We have a whitehawk 23mbh with the Denver mattress. We left all our linen on and just folded it up during the day. It fit well. Not sure about the extra foam. We have not needed it but our mattress might be thicker. I really do not know as this is my first jayco
2017 F-250 Lariat
2016 Whitehawk 27DSRL