I ended up taking M-25 from Bay City to Port Huron. I was hoping to catch the Callaway as she made her way down. Sadly, that didn't work out as she was pretty close to Algonac by the time I hit Port Huron.
As I was heading down M-25, I looked out at Lake Huron and I saw a pair of ships working their way up. The first was the Mississagi.
She was followed pretty closely by the Algoma Enterprise.
As I was passing through Port Huron, I saw this ship as she was unloading in Sarnia. I think she is the Esta Desgagnes based on looking at MarineTraffic. Evidently this is the Bro Alma.