Hi. I agree with oy vey. What do you want to know?
I live in upper Michigan myself and have been to Mackinac Island a few times. Yes, it may be expensive getting there (ferry ride), but it is very different. No cars, etc.
There are many places to get married on the Island if that is what you want to know. However, be warned that the Little Stone Church on the island books up very, very fast. I think it may be booked more than a year in advance. There are also some parks that you can get married on....bed and breakfasts...and, then, of course, the Grand Hotel, which is magnificent!
If you have not been to the island, check it out FIRST before you think of booking a wedding on the island. Obviously, the weather is a big factor. With it being an island, and in upper Michigan, it's NOT that warm/hot, although summer temps can get up to about 80 or so. DO NOT try to plan anything outside in the fall....it's very unpredictable and could be raining tons.
That's about it! You can also contact the Mackinac Island Chamber of Commerce for additional information, or look online.