Dave
I fish for walleye on Brookville Lake, Ind.. We catch alot of our fish on flats in 15-25' of water using a 1/4-1/2 oz. chartreuse jig w/live nitecrawler or trolling cb shad color. I have also positioned my boat on gravel banks in 15-25' of water watching my depthfinder for schools of shad and marking fish and just dropping a jig with crawler over the side near tm depth finder and jig the crawler up and down and have done well this way too. You may want to try a hopkins spoon with this method too.
Bassky
Dave