Exactly what we do. Little Buddy adds a lot of heat. We fire it up before getting undressed to crawl in the bags, then fire it up when the alarm goes off and snooze alarm for 10 mins then crawl out and get dressed.Buddy heater, we warm up the tent for about an hour then kill it when we rack out. Once in a while we'll use in for a bit throughout the night but not often. I will crank it on when the wake up alarm goes off to take off the chill before climbing out of the bag.