Beaver Island State Park, on my home island in New York, is a William Harries tract. It is nondescript, flat as the flattest pancacke, and suffers only from drainage issues. Grand Island is a clay plug, except for the northeast portion, called Sandy Bay. BISP is on the southern end, so it is clay, clay, clay.
I spoke with one of the movers of NYS Parks and Rec a few years ago, at James Baird in Poughkeepsie. He indicated that he had heard about Beaver, but had not visited. BISP is lots of bunker-left-bunker-right in landing zone, followed by bunker-front-left-bunker-front-right at the green. Uninspired golf, that could be remedied without much investment.
Cases in point: the par three holes. Number three could be an Eden. Number six could be a Biarritz. Number thirteen could be a redan, and number seventeen nearly has the greensize to be a Short.