If the Hall cosplay doesn't run too long I'll be there in My Gen. Iroh II as well.
I'll also bring my own camera.
Somewhere with plenty of shade for a midsized group? Best bet would be either in the hotel lobby maybe, in that section in front of the South Towers (next to the computer lounge. Or in the 1st floor convention area, next to the windows, where a-kon usually set-up their autograph tables. Afest will more than likely have that area clear.