"Vertical Fishing"
"On most bodies of water in winter we're looking at a vertical situation as far as cover types go. To explain: Bass usually move deeper during the winter months. On some lakes that may mean they pull into creek channel for the winter."
Here in MO it is common to find fish as deep as 75' in the winter, especially on Bull Shoals and Table Rock. Dragging or fishing vertically are about the only ways one can get to these fish. For vertical fishing I have had good success with a jig head and grub or a good bucktail jig fished barefoot. Craw jigs with 5" grubs work well but take a long time to get down to where I like to fish.
Standing timber, rock piles, bluff ledges and brush piles hold deep fish. I like to move slowly with the bait as directly below me as possible. Sometimes it can be kept in the cone but not always. I drop the bait to the bottom and lift it up no more than a foot, give it a little shake, then let it hit the bottom again. If there are walleye present, I hold the bait off the bottom for about 10 seconds before I let it drop. (That is when I have caught most of them.)
I have found that my catch has been significantly improved with braided line. Since the fish are a little slower, I use a light braid (Power Pro 8/1) with no leader. With mono I have trouble feeling the bite much below 30'.
I generally start out on ledges or points in 25 fow and work my way to fish. Once I find a few fish in a certain depth, I concentrate on that depth for quite a while.
In rocky and brushy lakes be sure to take plenty of jigs.