The site itself is never closed as long as you check-in before they gate closes... which I believe it's 8-9pm depending on the season. Even after the gate closes, you can still go in and out of the campgrounds if you aready have your tag.
Oct 29th. Reopens in April 2018
Campgrounds May-September : 8am to 10pm March, April and October: 8am to 9pm November-February: 8am to 8pm Closed Christmas Day
End of October
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