Book online on the park Website.
Oh I am going in augset
You can book on line at reserve america. You can book up to 9 months in advance.
You can book online, however if you are trying to book major holidays you can and need to start booking early. Usually spots fill fast. You can start booking in Jan which is I believe the earliest you can book.
There's an online site called fair haven beach state park
You can do that on line
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