At East Lake the Callibaetis hatch is very so so, and I don’t know why. I am hopeful the 2nd brood that hatches in August and September will happen with big numbers of adults each afternoon. Time will tell. 
I finally saw this week a great amount of damsel adults and the fish were leaping for the hovering adults and some of the takes were absolutely vicious. 
Many fish seem to be running deep in about 15 to 32 feet of water. Fishing a Type 7 full sink line with a red blood worm on the point and a blob on the dropper tag has been paying off well for me this summer. 
Most days the terrestrial game is a good bet along the edges and rocky shorelines. Beetles are my favorite, but the hoppers and ants are necessary too. 
I’ve heard that the evening dry fly bite is better, so maybe the answer is 6 to dark for dries….