We were there around the end of September. Stayed at Mackinaw Mill Campground, which was pretty nice. There is a free shuttle to the Star Line Ferry. It was easy and convenient. I was a little disappointed in Mackinac Island. It's basically a tourist trap type area--lots of shops selling stuff nobody really needs, lots of fudge shops, etc. We didn't find the horse poop bothersome, although it did take a few minutes to get used to seeing piles in the middle of the streets. It was interesting enough that I'm glad we went. We also rode up to Sault Ste. Marie to see the locks. We found that very interesting.