I made reservations ahead of time for Sheplers East tour a few years ago. We almost hit Poe Reef! That was because it was so foggy that no one could see it until we were just about on top of it. Sheplers did not cancel due to fog. This was disappointing... $45 to run around in the fog and not see much of anything. We could slightly see Round Island and the section of the Mackinac bridge that we were directly under.

Then some other ship hit a shoal and the Coast Guard declared an emergency so all boats had to go back to port.

So, I don't know if Shepler's normally gets this close to the lights on their tours, they had to when I went or we wouldn't have seen them. We got very close to Round Island.