Hi Dave,
I'll third, fourth, and fifth the recommendations to frequent your local woodcutters. I've found that there are usually businesses tucked around that have tree lots. These are places where, for a fee, tree cutters can dump their oversized logs and yard waste. They then grind it up for mulch or split it for firewood.
Find one nearby (or call a few tree guys and ask if they have log yards), bring the owner a cool little vase or bowl, and ask to walk around the lot. Don't ask for wood immediately. You can approach them after the walk around and ask it you can take one piece that you spotted. If they say yes, you're in and can write your own ticket. Just keep bringing them pretty things and don't abuse the priviledge. If they say no, just say thanks anyway and try again in a few weeks.
I haven't bought a piece of wood in nearly 4 years. Have actually had to give away and sell quite a bit, in fact.
Dietrich.
P.S. (Hey, Jeff. You're in Topsfield. Are you an ART member yet? If not, look us up in the local chapters guide and give me a call.)