Mid West Record Shows?

I'm from Detroit and regularly attend a local record show in Roseville, MI. At the show, I've picked up a couple of flyers for other shows in Canada and in Ann Arbor, MI. However, There must be some other shows in The Toledo Area and even as far away as Chicago. I'm willing to travel up to 4 hours to a good show in search of good vinyl. Any vendors out there able to direct me??