My family moved from that area when I was a child, but searching my Google Terrain map shows me that eastern Arkansas is pretty flat until west of Hwy. 67 (Pocahontas), where the foothills of the Ozarks begin (NW Ark.). All of E. Ark and W. Tenn. are lowlands of the Mississippi River. Tenn. elevations rise east of the Tenn. River (Shiloh).
There's about 6 or 10 participants who can give you good information and if we just keep chatting they will find you. All here are the "goodest" people. They just seem to be busy right now or on vacation. Just keep looking around....and have fun!