I've got a Hunter trailer and I purchased the foam mattress from Hunter which has worked fine for the past 4 camping trips, but in my never ending quest to spend money I purchased this from Costco: http://www.costco.com/Browse/Product.aspx?prodid=10042022&whse=&topnav=&cat=&s=1
What an improvement! I always thought that I was a hard mattress guy, but the older I get the more I appreciate a little cushioning. This mattress topper is great.
OK...foam is suppose to retain heat and I haven't tested this out on a hot humid night so I don't know how much I would like it under those circumstances. BTW, I have a queen sized sleeping bag that I sleep in so I don't sleep directly against the pad.
Food for thought for those of you wondering what you're going to do for a mattress.
Later,
-Sarge