Smith Creek is a delayed harvest stream so it does get hammered but they put a ton of fish in it. Close by there is the Chattahoochee, it also gets hammered but again they put a lot of fish in it.
There is also Dukes Creek that allows fishing on Wed, Fri and Sat by appointment., it's a State Park. You can contact Unicoi Outfitters in Helen and they will give you the scoop. They also have several pig streams like on the Soque that you can pay to fish.