Wonderful park, easily mistaken for Appalachia!  Variable site options for all sizes of vehicles and modes of camping.  Well-staffed and well-maintained.  Easy access from the Interstate south of Indianapolis and worth the diversion for travel camping (as we did); certainly worth it for a regional destination.  Toilets and bathhouses of varying age and quality, though the ones we experienced were excellent!  Camping is on a ridge or plateau with trails and roads descending from campground levels.  There are many activities and even paid horse guides/rides.  The mountain biking is excellent, with purpose built trails for beginner to expert (flow, berms, rollers, jumps...).  The north entrance is through a covered bridge with a 9 foot clearance and 3 ton limit!  Otherwise, use the easily accessible west entrance, just a few miles "around the corner."