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Build Mors Super Shelters. Basically, a lean-to with a mylar blanket a fixed to the inside of the lean to, a raised bed or you bedding of choice, then a plastic clear tarp that hangs over the entrance of the lean-to. Outside then is your fire, and I recommend heat reflectors aiming towards the lean-to. That will keep you toasty.
I advise you to still bring your sleeping bag, maybe a wool blanket, etc.