An evening pause: As noted at this website:
The island was America’s second national park (after Yellowstone National Park) for 20 years and has been the state of Michigan’s first state park. The island has had a ban on automobiles since the earliest days and still has the only highway in the nation where cars are banned.
Apparently, during the winter the horses are taken to the mainland for their benefit, and then returned in the spring in preparation for the summer tourism season. As this is the Friday of Memorial Day weekend, the start of the summer season, this seems most appropriate for tonight.
Hat tip Wayne DeVette.