anyway, about ice fishing, it would be one of those open floor hub style shacks, the insulated variety.

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and then have styrofoam pieces to cover the floor for insulation and keep you up off of the ice. have a few pieces for covering the holes that pop out to fish during the awake time and then cover the holes for night time. lay a big tarp over the top of all of it to keep your stuff dry.

condensation would probably become an issue, but they do have vents for letting some out and the windows can open to 'air it out' occasionally.