I agree, Doug-fir is one of the best firewoods a person can get only wood better is Western Larch.
Growing up, we would cut about 25-30 cords a year about 10 cords each for our house, the neighbors, and my Grandfather.
Dad's neighbor bought a split axle studebaker that would hold give or take 3.5ish cords. Was a giant pain in the ass to fill that thing and we would usually start getting firewood about middle of June through September.
Long days as we would head over Lolo pass into shotgun creek to cut those big dead larch. Had 300 feet of cable with snatch blocks to pull some of them up to the road when we creamed all the "easy" stuff from the uphill side. It was really a small logging operation, and frankly, I don't miss it. Not sure how we never got killed or maimed.
Can't really top the quality of wood heat.
That said, the only firewood I cut anymore is for my wall tent stove, and that brings back all the memories/nightmares I need of cutting firewood.