Hi there - just had five days at CCC site (Blackmore) and experienced the coldest night of our lives - however OH worked out how to set heater setting correctly and the following 4 nights were lovely! Looked into buying a memory foam mattress topper from the various Caravan bedding suppliers but was horrified at the prices. Anyway, walked into a Poundland Plus store whilst away and there was a double memory foam topper reduced to £29.99 - took it back to van, stretched the fitted sheet over it so that the excess bit on our nearside bed was effectively strapped down and had lovely warm night's sleep for a fraction of the cost of a made to measure topper. I think I've seen these in Dunelm Mills too for about the same price. Well worth the money as although our mattress very deep, was slightly on the hard side and this made all the difference! Thought I would share - sorry if this has already been posted.
Lisa. BTW had forgotten how loud torrential rain and hail was bouncing off the roof and windows of a caravan!