Nacho thats a great run.. I do whats called the "Snake Run" once a year..
This is what we normally take.. GA 60 from Dahlonega to Suches, GA 180 from Suches to US 19/129, US 129 South to Alt 75, Alt 75 North to GA 348 (Richard Russell Scenic Highway), GA 348 to GA 180, GA 180 to GA 180 Spur (Brasstown Bald), GA 180 from Brasstown Bald to GA 17/75, GA 17/75 South to Helen.
It sucked tho this year I ran it Sat which was crappy weather and all you had was pea soup up at Brasstown Bald. But I still love the run..