If fishing during the day, go to choppy water, stained water, or a combination of both. I don't know the water temperature there, but I'd say they are probably gonna be at least 20 feet down during the day unless they are under rapids. My favorite way to catch walleye for EATING or sheer numbers is find a school and just drift with a jig, after casting a crankbait a few times. The best place to do this is under a small waterfall or below impassible rapids. The fish that wash down from these places tend to just stay put in the rapids and wait for whatever floats down. If you want size, I'd suggest trolling, as the bigger females tend to be alone or in small groups. I prefer minnows as my livebait, but nightcrawlers and leeches work very well. For artificials, my favorites are crankbaits, either rapalas or rebel crayfish, inline spinners, and soft plastics such as cabelas aquaglow, grubs or worms doesn't matter. Swimbaits also works well. I look for rocky areas to fish them with, especially ones with drop offs. During the night, they will come extremely close to shore, and if there are a lot of leeches where you fish thats where they will be at night.