Don't forget about the rocks!!
Have a steady fire throughout the nice until its bed time. Rocks the size of your head should be pre-heatted and turned beside the fire all night. When it is time for bed, wrap up the rock(s) in towels, and sleep with them in your sleeping bag. It will retain heat the entire night, keeping you nice and toasty =)
Used this technique many times before... It works extremely well!
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