If you are tired of snowmobiling only one day a weekend, or wanting to see new country;
You need to learn how to winter camp. Winter camping in Alaska is learning what works for you under a wide range of conditions. Reading books on winter camping, is a good start, if you plan to camp at temperatures above 20 degrees. I remember a Caribou hunting trip I took my wife on. I waited for 3 weekends for the temperature to go above 30 degrees. She does not like the cold.
We headed for Cantwell and found a place to park, everything was going as planned. Over cast skies and the temperature was a warm 30 degree above. I hadnít used the camper in a long time and decided not to turn on the heater. I had my wife sleep in a double sleeping bag. Knowing she would be warm at 30 degrees. By morning the skies cleared and the temperature had drop to Ė 20 below. My wife was warm all night and my truck would not start. We had to be towed back to Cantwell. After getting the truck fixed, we were back in Anchorage five days later. She never went hunting with me again. The reason I mention this is you need to be prepare for the worst and that includes rain.
Most people think you need an expensive sleeping bag or special clothing to be warm. People have been winter camping for thousands of years before the modern sleeping bag or hi-tech clothing. A major problem with sleeping bags is the manufacture will claim their bag is a -20* or -60* bag. This may be true under the most ideal conditions. At best you will not freeze to death, although you may be thinking you are. Another problem with sleeping bags is some manufactures put very little insulation on the bottom. If you are a person who sleeps on his side your back will get cold.
If you want to learn what works for you do your home work.
Camp out in your back yard for 2 or 3 days is a good start. What I recommend you do is spend a day snowmobiling and then camp out by your truck. You will find what works in your back yard may not work after a long day of snowmobiling. You will be wet, tired, hungry and thirty. If you have good gear and know when and what foods to eat and liquid to drink you will be warm.
Most people winter camp in a tent, and use a wood stove. I personaly never used a wood stove unless I am in a cabin. It is very dirty, and you have to bring wood or find it on the trail. I use a 3-man dome tent and an MRS stove. A 3-man tent is big enough for one person and I donít need a pull sled. This works for me because I donít spend a lot of days winter camping. If you want to spend several days camping you will need a wood stove or Propane heater to dry your clothes.
Several years ago I asked an Iditarod champion (no not him) how he stays warm sleeping. He thought for a moment and said, I was never warm, and then added, I did not care; I was doing what I love.