I'm in a somewhat different position since, as a student, my primary care is at the university's health center. At first when I was having problems they managed it there, and sent me to the ER twice. The second time I was at the hospital inpatient they assigned me to a GI doc who outright said, "I can't help you, but I'm happy to get you a referral in Chicago."
My mom works in hospital in Miami, and was asking around regarding hepatologists. The name of one world-class doc came up, but he was way too busy, so he gave her names and phone numbers of docs in my area. One was for a local doctor who was a personal friend. Turns out he was retired... and the number given was his home phone number! But he gave us the name of yet another doctor in our town so I saw him for a consultation, he worked me in to his schedule and gave his opinion.
The original GI doc got me an appointment very quickly with the head of U Chicago's hepatology department, who also said "I don't know what's wrong with you" and ultimately I got a phone call from his nurse a month or so later saying he had "nothing to add" to the local GI doc's opinion. I wasn't impressed. So... I hope your experience is better, but don't go into it thinking that seeing a top-notch doc will be the answer. I think the most important thing is finding a doctor that is genuinely interested in your case. From what I have been told recently, the hard part of Crohn's is getting the diagnosis, and after that, pretty much an GI doc can manage the treatment. If you feel your local GI doc does not help you enough, maybe when you see this doctor at U of M, ask her if she can recommend anyone in your town, or if she knows someone who can.
At this point I have gone back to the local GI I had a consultation with, he did my colonoscopy, diagnosed me, and it seems like I will continue with him since he is also interested in hepatology. I plan to call back the doc at chicago and give them a second chance (recent CT scan picked up possible new liver issues) and also see if they can get me an appointment with an IBD specialist there for another consultation on how to go about treatment.