Hi there Holly,
I am in NW Ohio…so I don't specifically know of any basenji savy vets in that area. Contacting Dr. Tracy is a good idea. I have used Animal Clinic Northview, in North Ridgeville, OH for reproductive stuff. I have never used their "regular" vet services, but I would imagine that they are great; their reproductive staff has dealt with quite a few basenjis. If you google the name of the clinic, you can find the info. Also, if you use the bcoa breeder list, I think you can find the info for a woman named Jan Bruner..she lives in the Cleveland area and has Bs...she could probably send you in a good direction.
That all being said, I don't think you MUST have a vet familiar with Basenjis...as long he or she is willing to listen to their clients, and outside sources. My vets hadn't had any Basenji clients in a loooong time when I started there...the older vets had had bad experiences in the long ago past...but are thrilled to meet my guys, and learn more about them.
I think anyone should beware of a vet that says 'we need to get this fixed right away' when the issue isn't a problem for the dog. A vet may not agree with Basenji breeders that umbilical hernias are not a big deal...but a vet shouldn't try to convince a basenji owner to have an expensive surgery if the hernia is small, and not causing the dog any problems. I had Blondie's hernia fixed when she was a few years old, during a scheduled tooth cleaning, because she was already down.
Anyhow, feel free to contact me further if I can help.