I may be up there, but won't know until I get a little closer. My mother likes to go up sometime in the summer, and her husband doesn't go anymore (his knees are bad so he can't walk around, but has too much pride to rent the carts)...so usually we go up at least once per year around that time. I won't know the exact dates, but it usually falls in June/July...so I'll let you know when I know!
I'm with JC - it's darned hot up there in the summer, so I spend much of my time running from AC to AC...and lots of refreshment stations (I don't do the beer thing...so anything that serves cold sodas, juices, iced teas, etc is where I'll be!). Definately not running around when up there for summer - it's slow and easy, hunting for shade and AC, and kicking back!