Michigan touring is great! I tour the state every year on the Michigander, hence my user name.

I strongly recommend you do the Michigander for your first time touring. It's great fun and in case of break downs it's easy to get help from the other riders, and that can come in handy when you have 3 flats in a row. Plus, you can get driven in to the next destination if you crash. Supported tours are a lot of fun. It depends year to year, but 400-800 people do the ride.

http://www.michigantrails.org/michigander.asp