So I made a long day and stopped in Thompson. There was word of a possible overnight spot at the Thompson Christmas Tree Ship site. This site is not marked, but there is a small historical marker with information signs right on the river. See this link for info:
https://www2.dnr.state.mi.us/publica...C772006035.pdf
So there were a couple spots right on the lake, but also signs about "recreation permits required" so I opted to overnight in the huge park and ride lot that you pass on the way in. Worked great and we moved early the next morning to the parking spots. Wanted to get another sunrise over Lake Michigan:
From there, I headed east towards the Mackinac Bridge.