I'm planning on taking chemical hand warmers with me on the Texas Hang-in a cupla weekends from now. @DivaB: I plan on putting a few in my UQ to see how it works. Should be close to what you suggested. Since I'm taking a pickup and won't need room for firewood (burn ban is on) I figure I'll have plenty of room for them. They will have less impact on my gas mileage than the firewood, so I should be ahead on the environmental issues. No cracks about gas mileage in a pickup. My main transportation is a hybrid!! I slept COLD at last year's hang-in. I don't plan on a repeat this year, with or without a camp fire.