I am a Yooper and therefore eminently qualified to answer this question! I think we have a quilt store in most of our little towns. You should look in the yellow pages as you pass through the towns. I have been to a few around here and will list those for you, but I don't know how close you will be to my area, so I don't know if these will help.
I live a block or so away from Quilter's Haven in Menominee, MI, and just across the bridge from us in Marinette, WI is a smallish shop called Pine Street Quilts. I consider it my civic duty to stop in to Quilter's Haven at least every couple of weeks. I wouldn't want the economy to suffer too much, right? LOL!
There is the one that Kay mentioned- Jeri's Quilt Patch in Norway and that one is neat- it's an old house with antiques and stuff for sale in addition to fabric. They have a huge sale every year around the Super Bowl where they sell fat quarters for FIFTY CENTS!! It's a madhouse in there for that.
I visited one in Ironwood, Mi- it's called the Fabric Patch- a long time ago. I think it was a smallish store, lots of Thimbleberries type fabrics. Ok, I just googled it and it's a BIG store. So it's not the one I went to, unless they made it bigger. I think I want to go there after googling it. It looks AWESOME!
I haven't been to the store in Escanaba, but the gals at Quilter's Haven really rave about it- the owner's name is Glenna and I guess she is an amazing quilter and very nice.
http://www.quiltsnstuff.net/
There is the website and this is one that I would like to visit in the future, just because I have heard good things about it.
I follow a blog for a West Michigan shop. I haven't been there, but here is the blog with the store's address:
http://westmichquilter.blogspot.com/
I hope that helps! If you do go to Quilter's Haven, tell them Lisa sent you! Or better yet, PM me and I will meet you over there. :0)