If he is targeting walleye he should concentrate on either the deeper water north of the buoys (117-111 have been producing), or in the weeds (anywhere in the lake from 3-20 fow). In the deeper water try drifting work harnesses, jigging black/purple jigs tipped with half a worm, or jig sonar’s. In the weeds he can either drift the weed edges, or pick the holes within the weeds. In the weeds you can use smaller jigs, or live bait (worms, leaches, crawfish) with a bobber. The weeds will also produce a lot of other species that the deeper water may not (sm bass, huge sunfish, chain pickerel, etc...). Good Luck!