There are a group of APUG photographers informally meeting around the Harbor Springs to Mackinaw Straits area between June 18-27. Most are visiting the second weekend of that interval. Check out this thread for info. I'm sure you would be welcome. It would be about 3.5 hour trip from Lansing, but not too bad of a drive if your weekends are free. There might even be some APUG folks from the Lansing area or points south heading that way should you lack transportation.
jmxphoto has published some maps in that thread showing good photo locations in the general area.