You have a lot to pick from, no reservations required. Tent, camper, or walk in, all are welcomed. Water is available during the summer, restrooms are ok, trash can through out. Plenty of privacy in your space, all for 15 per night and no national park entrance.
Plenty of hiking spots and a cave to explore. Cafe and gift shop not far away.
Great national park to visit, not very busy but very beautiful.