Hi We are currently camping in Devon, we had the same issue, we now use a Panda memory foam topper, with an Outwell camper van 5 self inflating mattress. this has help so much to give us a better nights sleep...if you are using the van in the day time as we do we roll the bedding up but put the Outwell into the awning, when the season is done you can deflate and repack into a small tote it comes with, bit of a faff to do everyday, I also blew some extra air into the Outwell with our electric Vango pump...its still not home but has definitely improved our sleep...