No map as far as I know with gps plots. Never fished walleye but have seen a few big floaters I have heard the weed edges are good. Bass fishing is excellent shallow cover and weed edges are good. Pike and muskies are usually in heavy cover or suspended from the weed edge out by august. Usually the suspened fish are near structure and fairly shallow, I imagine that walleyes might suspend as well.The lake has several points and the offshore humps are mostly in the southern end of the lake. It is a lot of lake with a lot of structure and can be intimidating at times. I would suggest geting a map, using your depthfinder, taking you time to pick apart a few peices of structure instead of trying to fish it all. If you have a bigger boat, heads up, there are lots of shallow sand/rock bars that come sharply out of deep water and for some reason the bouys are missing on several hazards this year.