Easier way to do this is look at your closest bigger university. For example, when I lived in Indy I went to IU Med Center and had a Dr. Chiorean who, if you look up on their website has a Ph.D and a M.D. That's a good start.
You can also call the hospitals and as their staff which doctor specializes in Crohn's. If you're daring you can ask your current GI to recommend someone (you could lie and say you'll be relocating and need someone nearer to you).