I jig the mouth or the Niagara Bar and prefer this method for this location. The Bar is like a big shelf that holds a smorgasbord for hungry feeding fish. Drifting while presenting a jig, spoon, three way rig with minnows or roe, or anything vertical is the technique most commonly used. But when fishing out on the main lake I think vertical jigging is tough unless you have found some sort of transition point or structure holding fish. Vertical jigging is not a search method but is a great method once you locate them. Again this is only an opinion but works for me.