Three Creeks Lake is okay, it has been on and off with the bite but one consistent point has been the evening midge hatch. Callibaetis have been waning fast, but not over yet. 
Get some Ants and Beetles and Hippie Stompers. With the hot days and warm evenings coming this week, make sure to bring Black X Caddis #16 for afternoons and evenings. 
Deeper indicator fishing is highly recommended with an Ice Cream Cone (Black with Red Ribbing), Chromie, the Chartreuse Beaded Black Balanced Leech with the Leather Tail (*so cool!) and the Bruised with the Hot Orange Bead are the best you can try. 
If you are kicking around in the tube, troll a Sheep Creek Special and a Hot Bead Damsel and trail a Flashback PT 3 feet off the bend of the 1st fly.