What fun! I'll be watching this thread, hubby and I are planning a road trip back home from Seattle to Grand Rapids next year. Will be a family visit and not a fabric buying trip, but things happen. Currently we are considering taking the ferry from Muskegon to Milwaukee on the trip back.
I don't know much about the quilt shop suggestions in the area (will be watching this thread!) but I often find the odd fabrics I'm looking for on-line at Fields Fabrics which just happens to be in the area.
https://fieldsfabrics.com/locations