I live on a sailboat here in Jersey. I don't run any heat when I'm out, or sleeping, for safety reasons. It's been right frosty mornings. I have to get up a half hour early and crank the heaters, then crawl back under the covers till it warms enough deal with it. I usually wake up sweating though, as cold as it is in the boat. With enough blankets your body heat will keep you warm in some icy weather. I had to heat-up my toothpaste when I got home today before I could use it as it froze solid while I was at work. I like October and early November best!