Lots of good info here!! When talking to the local orchards... be sure you are talking to someone who can tell you the correct answer. That may sound odd of me to say, but some of them employ so many people that not all of them know if they even sell or give away such things. Make sense? This time of year should be a good time to hit the orchards up.
What I have done, is look to craigs list. Yes that can be a gamble as far as getting what you pay for, how it is seasoned, etc.... But I have found several on there that specifically state oak, hickory & cherry. The last guy I got a hold of brought me all oak and cherry, sure there are a few other logs thrown in by mistake. But I can see why they did judging by the outside appearance.
Hope this helps, and if you find some good sources post them up here and share the wealth!!