Such structural elements provide cover for baitfish, leeches, crayfish, and foraging walleye. Scour a prospective hump with sonar and the naked eye. If deemed worth fishing, mark the top of it with a buoy. The absence of nearby landmarks makes it easy to loose a hump. A marker buoy also provides a reference point to the hump's shallowest water.
Depth is the next crucial consideration.
Walleye can be grouped tightly and easy to miss. Sonar might pinpoint the precise depth to fish, but often we must deduce where walleye might be holding by using what we know about their daily and seasonal habits. In spring, walleye gravitate towards warming shallows, but move progressively deeper as waters heat up through summer. By fall, many walleye are at their deepest and remain deep as surface waters cool and sink. During morning and evening low-light periods, walleye feed in shallower water and retire deeper by day.