One was the Mississagi, a cargo ship that was 620 feet long. We didn't see any other loopers until we were within 2 hours of customs. Then we began to see some familiar boats (WyeTug and Fruitcakes)
and several we didn't know. Ron, ever the researcher, had figured out, through the somewhat confusing government website, how to file a float plan, get the appropriate documents, and call in to customs for clearance instead of reporting in person at Drummond Island. Lucky for us, because a number of boats were checking in at the same time at Drummond Island Yacht Center.
We reserved our slip on line (Michigan State Park Reservations) at a cost of $8.00 for a reservation, but the slip itself cost only $43.00, still less expensive than any marinas. As we entered the harbor, we saw a ferry and a cargo ship.
There are very few boats here, mostly locals. They said they are never full and you don't need reservations, so save your $8.00.