Some links to make the visit more enjoyable and interesting.
About Mackinac Island
http://www.mackinawinfo.com/mackinac-island-information/
Restaurants
http://www.mackinawinfo.com/restaurants/
The Mackinaw Ferry
http://www.mackinawinfo.com/star-line-ferry/
Day Trips
http://www.mackinawinfo.com/mackinac-day-trips/
Things to do, places to visit
https://www.mackinacisland.org/stay/
Visit the Island
https://www.mackinacisland.org/visit/activities/
Mackinac Island Ferry & Schedule
https://www.mackinacferry.com/
Mackinac Island Overview
https://www.visittheusa.com/destination/mackinac-island