Least stressful route from Hiawassee, GA to Pikeville, TN?

What Ivylog posted is quite true, the road is much better now. However if you are planning on taking this trip on a weekend I would not use US-64. I would take US-76 all the way to I-75 at Dalton GA. Then I-75 north to TN-153 in Chattanooga. Take TN-153 north to US-27 north, then TN-111 to Dunlap TN and US-127 north to Pikeville TN.
TVA releases water on the week ends and the Ocoee Gorge becomes one large traffic jam of rafting company buses, kayakers & others who stop and look or park everywhere.

64 is a much better road today... one of my favorite in a 45’ MH except for the slow moving 4 wheelers from FLa. The 2 bad curves have been widened through the Ocoee gorge... the only curvy part as much of it is a divided 4 lane,

Unfortunately once in the gorge there are not many places where you can pull over and get out of the way.

Sorry, cant help on the route as we approach from a different direction, but Mountain Glen is one of our favorite CGs. Very laid back, great location.