I grew up camping in Arkansas. If you are looking to go lakeside, try Degray Lake State Park, Lake Ouachita, or Lake Catherine SP. Greers Ferry Lake is also nice, but mostly or all Corp of Engineers campsites (a little outdated). At Greers Ferry, we always stayed on the river side, John F Kennedy Park. In the summer it's cooler and if you want to drive over the dam to swim, it's a quick trip. I think my personal favorite is DeGray.
Amber, Jason, Aidan, Addie, and Charlie
2011 GMC Sierra 1500 Crew Cab 4x4
2013 White Hawk 28DSBH