Wooden Bowls

Each wooden bowl starts out with a tree that has come down or a piece that has been trimmed off.  Where do I get my trees? I might be known to slam on my brakes when I see trees chopped up on the side of the road. I also try to coordinate with local arborists and snag wood before they mulch or split it.
It still amazes me how different each bowl turns out, even pieces from the same log, same 12in space and each bowl is truly one of a kind.