I built one of those tents for ice fishing and have a little propane heater inside of it but it still gets very cold. Especially because you have to put a new worm every 5 min cuz they freeze to death or if you have to take fish of the hook and wash your hands in snow or ice cold watter. I found out that Vodka helps the best to keep you warm. Actually Vodka and coffee mixed tastes really good, i know it sounds crazy but i tried it and loved it.

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