Be aware that the State of NE requires a $20 per year camping sticker to stay at their parks, which can be bought on site. The road Hwy 67 from the south into the park is a gravel road for 8 miles. It was in good shape. The park is beautiful, with many hiking trails (fairly steep on the easiest of them). The cave area was closed due to flooding when we were there. Many miles of paved roads for biking or walking. Many spectacular overlooks of the MO River. We spent 3 nights there and would definitely go again. We camped here in a Travel Trailer.
This is a very nice state park campground. Although they don't have full hookups they do
have a convenient dump station just prior to entering the campground. We camped here in a Fifth Wheel.