Burns, Oregon area. Right on the edge of some vast forests. Used to be several different guys there that I could get firewood from but now I can find only two. Too much hassle with government agencies to get permits to cut wood. Even trees that have been burned, or that bark beetles have killed - government position is they'd rather see it rot than cut down and burned as firewood. There are areas in northern Nevada where range fires have killed a lot of trees but the BLM refuses to issue woodcutting permits. Used to be 20 years ago, anything "dead and down" could be harvested with a permit but no longer.
Burns is about 250 miles one way from me. Below is how I bring it in. About 5 cords at a time and that lasts me a couple years. I invested in a super-efficient stove with a catalytic converter 20+ years ago; it was expensive but worth every dime. I feed it twice a day and it keeps the house ~75 degrees, the way I like it.
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As far as helping bark beetles spread...it is many, many miles to the nearest pine tree from where I live. This is desert around here. They just have to starve to death!