I have used the Big Buddy propane heater for about 5 years. It has the option of two small bottles that will last about 4 hours on high or the adapter hose for a 20 lb propane bottle- with that I have never run out of propane during a season yet. It also has a built in fan that runs on batteries but I personally have never used that feature.
It has worked well in northern Mn. The only caution I would have is there is a glow. I usually hunt right up to the last minute I legally can. I just position the heater so it is not reflecting or backlighting. Not really a problem just something to pay attention to.
Last edited by MnFn; 11/09/12.