We arrived mid week in October without reservations. The campground host was SO helpful in steering us in the right direction both in terms of the campground and there is a Basic loop separate from those with electricity - not very used in October mid week. Bathrooms were centrally located in the campground. The campground is within an easy 1/2 mile of the historic town of Arrow Rock and also a slightly longer hike through woods and leaves and into the Wildlife Refuge to the Missouri River and a landing site. Lewis and Clark and the Santa Fe Trail play into this history here so that's pretty cool too. The Visitor Center at the State Park is really good and tells the story of the area well.