Lake Hefner Walleye Fishing

Hi there, I'm usually fishing Hefner right now, but took this day off from it, only caught 3 small catfish last night. I'm trying to learn how to consistently catch walleye. I had little success last year by throwing a nightcrawler on th bottom and letting it sit, caught a 24 inch 6 lber, and several others over 18 inches long, but it was slow going. If someone could throw me some tips for catching walleye at this lake from the bank would be greatly appreciated! I fish either the dam or the restraunts, wouldnt be opposed to trying other places though. Thanks for your help.