If you are winter camping here is a way to dry your boots. Simple and the cost is under $10. I have a set of these I take on all my winter camping trips as they not only leave your boots dry but warm when you put them on the next day.
Drop a disposable hand warmer in the top of each tube - then put your boots on the top of the pvc pipe. The warmer will pull warm air into the boot all night long.. I cut mine at a angle on the boot end so there is more airflow.
It works. Use the largest pvc you can get away with for the boots you are drying.