I've fished that creek since I was a kid, from the river up to Union Deposit. I've only ever caught a few walleyes and even then there was no rhyme or reason to it and they were all dinks. Now I have herd of people catching some pig walleyes in the Swattie but they are few and far between.
Yep... downsize everything. Light tackle is the way to go. Hit any structure that offers creates an eddy or changes depth. Hit all available cover and in the heat of summer fish any available shade. I love throwing a 4" Senko wacky rigged on 4# test line. The clearer the water the more natural the color.