I've never had much luck with a jerkbait, but then I've never really committed to it. It actually may have worked in the spot I fished yesterday. I have had some success on the float n fly in long, slow eddies, the kind that form sometimes on outside bends. There is actually a spot I'd like to try it that I found this summer. But for the most part my luck with that rig has been sub optimal. When all is said and done, I pretty much have settled on 1/32nd - 1/16th oz jigs with 2 1/2" - 4" Gulp minnows after late October, depending on conditions and fish mood.
As for how the river fishes. I have found that the same general areas that produce in the warm months also produce in the cold months. Just find the deepest, slowest water adjacent to the areas you normally fish in the summer and start there. It may be 10 yards away from where you caught fish when temps were at their highest, it may be 50 or more yards. Fish will occupy areas that provide the most of what they need with the shortest travel distance. That is a constant all year. That's the type of water you should focus on 90% of the time, although fish will move to more traditional feeding slots and actually chase a bit in certain conditions. Confidence is more crucial than any other time of year. You can luck into fish far more often from spring through fall. But in the winter, you really need to trust your feel and abilities. When you contact a fish, bookmark that spot. A winter hole is a winter hole year after year. You get two or three reliable winter holes and you'll be set until April.