I don't know what a thermacell is ( I will check it out), but I use a bug suit. They are hot, but the misquitos can't bite you. It is the best investment I have ever had for hunting. You can see mine on this site under "My 2005 buck" It has leaves hanging off for extra camo. It was about $40 at bass pro for the top and $100 for the bottoms. I only have the top.