Gorgeous spot! I stumbled across it in autumn of 2005 and spent four days there. Color was unconventional in the northeast that year due to very heavy rain. Both me and my equipment were fairly waterlogged by the time I left, but I came away with a few keepers.
If I recall correctly, it was supposed to be a National Park, but WWII broke out and the nation's priorities changed and the plan was abandoned. Eventually it obtained state park status.