Osage Hills is historic for Oklahoma as it was developed by a CCC camp in the 30's. You have the ability to see the work they did and even hike to the camp itself. The park consists of approximately 5 miles of trails for hiking and a nice smaller lake for fishing. It also has a creek that you can swim in if the water is high enough. The park is on the smaller side and reservations are a must. We usually visit this park when it is cooler and the weather is dicey since it is only an hour from Tulsa. The upper section is for tents only and every time we go it is either not open or has a boy scout troop that takes it over. The bathrooms are a mix of typical Oklahoma State Parks 50's style run downish and one newer facility. I would recommend this park as a great place for family's that are camping with younger children or trying it out for the first time.