Your best bet is to try to locate some warmer water. Locally, we fish a TVA steam plant bay in the winter. The water temp is always markedly higher in the bay, near the plant. Really pulls the cats in during the winter. Any lake shore / river bank industrial sites might have some effect on the water temp... worth checking. If that is not an option, find those deep holes. As far as bait goes, I don't know that they prefer anything different in the winter than any other time. When I'm jugging, I mix it up... night crawlers, liver, shrimp, cut bait, whatever... til I figure what they seem to prefer on that particular day.