I burn Red Fir (about 4+ cords per winter) as my one & only heat source. Sometimes some Tamarac if I can get it.
Not much use as fly tying material or fly rod grips. Some of the larger (older) trees have bark that could be used but
one can still get high quality cork if you are willing to pay for it. I know as I build Bamboo rods from scratch.
Denny