You Vanners are Brave, or ??? I had a van once with a bed, but it never hauled any cargo....sleeping on floors, couch cushions, rubber baby Buggy mats , Nope...today I dont get aorund that easy Ill keep my Sleeper, But I give you cats your Props...Propanes by product is Moisture, I have a free standing fireplace in my house in the porch area and on days like this the windows freeze up from that moisture....I like the Electric Blanket Idea but when you get outta that bed its colder then Santas backyard...I think Id have to spring for the ESPAR....I gotta have some comfort, the road beats us all up, Comfort is a must....I tell ya what I like is a Heating pad on my floor, get up, put my feet down there and ahhhhhhh, Stay warm fellas...