I haven't shown at, or been to, Blowing Rock, but have heard
positive things about it somewhere down the line...
One you might consider in GA is the Virginia-Highlands Summerfest.
I did it for the first time last year, and it was my best show of
the year. My jewelry price ranges from about $22 or so to $350.
The VaHi show is typically held the first weekend in June. I don't
think the apps are online yet...hmm, I'd better check on those
myself before I forget.