This state park is just outside Helen, GA. The blurb below I copied from their website. It's worth a visit even if you don't stay there.
"Smithgall Woods is an angler’s paradise. One of north Georgia’s premier trout streams, Dukes Creek, runs through this spectacular mountain property and is a favorite for catch-and-release fishing. To ensure a quality experience, the number of anglers is limited and fishing is offered only on certain days. As a result, anglers should call ahead for reservations. Five miles of trails and 18 miles of roads allow hikers and bicyclists to explore hardwoods, streams and wildlife."
Reservations (800) 864-7275
Park (706) 878-3087