I'm not sure about tents but usually all the RV spot r taken weeks in advance. But that was before covid so it might be different now.
Reservations are required in advance. Contact hotel for RV park reservations. Tent camping is allowed as long as you rent an RV site and pay the fee .. it’s not ideal for tents as most sites are just a gravel pad plus there is the train close by as well .. July and August full until after Labor Day .
I know they have RV spots, I am not sure about any tent spots
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