Go to travel.ok.com select the state park put in dates and it will tell you!
$10 per day/vehicle
Prices vary depending on if you rent a tent site, or a yurt, or a cabin....
I went there last month and the price was $16 per camp site per night plus one free parking.
Depends if you want a cabin, campsite, yurt. I think campsites are like 17 and cabins vary on days and time your there.
Last time I was there it was 15 a night not including parking
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