A propane lantern is enough to warm the interior. These structures come with names such as the Clam, and the Fish Trap. The important thing is that they allow you to take others out on the ice and yet be mobile. One thing that many modern ice fisherman want to do is to move from location to location. Sure, the carpeted ice shack with the bunkbeds is nice, but not as portable as the modern ice angler needs.
Weather is just as much a factor as it is in the summer time.
The walleye likes to feed during stable weather and if you are planning that early ice-time walleye trip check the weather before and during your stay. Sometimes the approach of a winter storm will trigger a feeding frenzy because of the advance of low light conditions. Regardless of the type of lake you fish, your choice in baits is also critical. Use larger baits under stable weather conditions. For walleye and pike, don t hesitate to use the largest shiners you can get.