What are you looking for big walleye, just average eating walleye? I am not a guide but I might be able to give you some good leads around the Saginaw bay and river area. If you hit Otsego lake(Gaylord) or Houghton lake (Roscommon) just right you can do well on average size walleye. Saginaw Bay would be the spot to go for large walleye, you will need a snowmobile or four wheeler to fish it.