I love winter camping. Unfortunately, severe diabetes and a bad ticker mean that I shouldn't camp alone and especially in the winter in North Dakota. My regular camping friends are simply not interested and regard my enthusiasm for tenting in subzero weather as just another sign of mental instability.
There's almost a sense of purity when it's 20 below zero or colder. You wake up in the morning, take a deep breath and burrow even further into your sleeping bag. Eventually you realize that spring is months away and you simply have to get up. You find your clothes, which you have thoughtfully put in the bottom of the sleeping bag, put them on and emerge into this white, white and very cold world.
A fire, a cup of hot coffee and a bowl of hot oatmeal with brown sugar remind you that life is good.
Opportunity for activities are more restricted, but the opportunity for contemplation is much greater. I hope you will take the opportunity to camp in such conditions, but be careful -- subzero temperatures are not to be taken lightly.