TLDR - Look up all the local tree services and logging companies within a radius. Make a spreadsheet and start calling. If you see guys cutting on the side of the road don't be shy...pull over and ask what's happening with the wood. Have cash ready. You'll be surprised that some of them just want to dump the wood and make some extra $$ versus the usual rate at the mills etc or be happy to help a local burner.
My log sourcing story:
Not from Maine but I buy my firewood in the form of bulk logs. I think its the best way for folks without massive acreage to harvest or those who simply want to eliminate the dangers and work load of felling trees.
I live in suburban MA and there are TONS of tree companies within 15 miles of me...over 20 of them in fact. I made a little spreadsheet of the companies and started calling the closest ones first. I called the big ones and the smaller mom and pop places and kept track of the responses. Tree guys don't always answer or call back...they have tons of local work and may not want to be bothered with little old me after logs.
After calling 10 or so I got a hit on a guy next town over. He delivers me a trailer full of hardwood yard tree logs, which is about 1.5 to 2 cords worth, for $100. It's typically 80% red maple with some oak, ash, and cherry mixed in. Pretty good. My son lovingly calls this up "Tree Guy Ed" lol. I'm Tree Guy Daddy.
I was after more logs earlier this year and Tree Guy Ed wasn't getting back to me so I hit the spreadsheet again and called the next closest 10-15 companies and I got another hit, next own over again but the opposite direction. This is "Tree Guy Jason". He delivers me a full logging truck load of hardwood logs, which is about 5 cords, for $400 next day. Said he'll give me as many loads as I want...even offered me 5 loads for $1,000! Great deal but I live on 1 acre in the suburbs and am 1 guy doing the work what would I do with 25 cords lol.
Fast forward about 2 weeks after I hook up with Tree Guy Jason and I'm finishing processing the giant load of logs into rounds/starting splitting and Tree Guy Ed calls me saying he has a load of primo maple. Yikes! My driveway is literally chock full of wood. I spoke to the wife and she said what's 2 more cords soooo I made room lol. Had 7 cords in the driveway at once! Still working on it. Have about 3 cords left in rounds stacked in the driveway waiting to split when the snow melts. Been non stop snow lately.
So now when we go out back to get wood my son asks if that particular batch is from Tree Guy Ed or Jason. Its important info at 5 years old!