BBW, I don't fish the Hiawassee, but I would suggest you consider flies that are tradional to the area. Things like Yellow Hammers, Thunderheads, George Nymphs, Tennessee and Carolina Wulffs would be good places to start. I would probably have some Mickey Finns and maybe some yellow &/or orange Stimulators as well. You might want some weighted flies, if the current is swift when you're fishing.

Good Luck!

Ed