MyFishFinder.com Just like iceshanty but warmer
You can have the best defensive line in the world but without an offensive there's no way to win
You can insulate to kingdom come but it'll only slow down the freezing I doubt any insulating or covering beyond a peice of cardboard of a tougher material will be a waste of energy the holes will freeze up eventually if you don't add some kinda heat element ie a small bow with a candle of more elaborate