Yes, you can pay at the gate. If they are at 100% capacity you won't be able to enter unless you reserved your day pass in advance. Book online in advance, you'll be glad you did.
No matter if it's for the day or the camp they want it paid either by phone or online! With the current changes aka covid the parks reach their daily limit especially on weekends! I didn't plan ahead and drove to a few parks just to find put they where at their limit unless u reserved ahead of time! To save on gas and time it would be better to go online in advance! Not sure if they will let u pay at the gate!
Yes you can pay at the gate.
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