Chattahoochee National Park Conservancy is the official friends group of Chattahoochee River National Recreation Area. Your River. Your Park. Connect. Support. Chattahoochee National Park Conservancy (CNPC) is the official friends group for the Chattahoochee River National Recreation Area and it 15 park units and 48 miles of National Water Trail. www.ChattahoocheeParks.org