In fall, what i have learned is, for most species, slow down your presentation.Use bigger baits. and fish deeper weed edges, and even open water. Troll crankbaits slow, 1.5-2 mph for walleye.
SMB will be deeper, in transitions from shallow to deep water, and this time of the year may be suspended in deeper waters.Alot of times, you will catch SMB in with the walleyes.