Get the heated mattress option! We love ours, even though it is a single control for the entire mattress. Ours is even comfortable (to us, anyway) with a thin foam mattress pad.
BTW ours is 8 years old and still works great. We like the heat from underneath better than an electric blanket. And it's great to crawl into a warm bed. One of the best nights sleep ever in the trailer we awoke that morning and it was 53 F in the trailer but the bed was snug and warm!
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"RVing and Amateur Radio served up on the same plate"
2008 (or is it 2009?) Rockwood 8280SS - 2007 F-150
Lot's of mostly Kenwood radios