Bequeathed to the state by a wealthy inventor who lived here from 1910 to 1945, this 912 acre island has several stone buildings that he built, including his home, a boat house, and water tower. No vehicles-not even bicycles, are allowed on the island, and it is accessed only by boat or ferry. There are house exhibits, seasonal naturalist programs, and several miles of hiking trails. Forty campsites are available for reservations; picnic tables, fire rings, and pit toilets are on site. Drinking water and firewood are available near the dock and boathouse. This campground is closed during the offseason. There are no electric or water hookups at the campgrounds.