Near Turner Falls, the Chickasaw National Recreation Area adjacent to Sulpher on the south is a wonderful park of camping, boating on Lake of the Arbuckles, hiking, Travertine Nature Center and more. It makes for a wonderful day trip. In fact, it used to be a true "National Park" called "Platt National Park." Great place, I'm quite sure your family would love it. The Turner Falls area could be made in a long day trip or a weekend trip. They're very close, but lots to do between the two.