Most of my knowledge is about the K'zoo to GR area, but if you can only go to one northern Michigan shop, make it The Ice House in Grayling. It's well worth it!
http://www.theicehousequiltshop.com/ Awesome place!!
There is now an online version of the Quilters Travel Companion which has shops, shows, guilds, retreats, everything you could ever want to know about quilting stuff in any state ot province.
http://www.quilterstravelcompanion.c...s/Michigan.htm Have a great trip...and Happy Anniversary! :D