Before the invention of pop ups or flip overs, we used to have quite a crowd (mostly eastern european) that put up windbreaks in a "V" or "U" shaped pattern depending on the wind. They used 3-5 poles about 2-3 inches in diameter inserted into appropriate sized holes drilled in the ice. Each pole had a support on the inside of the shelter area, something like a support for a clothes line pole. They used tent material about 4-5 feet high. Some of these groups brought out small open wood burners to cook on and sit around, fired by charcoal.