Can you park your camper here and spend a few nights ? And what is the cost ?

No overnights. Only day visits.

No, you cannot.

You can purchase a $69 yearly pass and spend everyday there from dawn to duskas long as you park overnight somewhere else in a camper

No

It's a State Park, but only because of the fort. No campgrounds.

Nope. Park closes at sundown everybody out!!