Most northern fishermen do the ice fishing thing, so probably not much of a demand. Most of those fellas are also meat fishermen and they catch all they need around home. As a matter of fact, they probably have more fun at home. The boys up north have real FUN fishing, esp during the winter. It is a social event. They keep what they catch and they share the where- and- how. The more the merrier. No competition. Some have those Aqua-Vu cameras and they actually WATCH their own fish bite. The bite is stable and basically the same every year. The fish relate to structure , the lakes shallower and not so much shad dependent. Totally different down here. Take the Big C for an example. Normally in July the lake slowly gets pulled, all the way to winter pool. Big rain- up goes the lake, changing conditions. Our fish follow the food, which now seems to be those deep water loving alewives, and we as a whole aren't the best deep water fishermen, and they also are just as happy in open water, which further frustrates us. I really suspect, if anyone is serious about finding winter walleye, they would want to begin in learning what the alewives do during the winter and go from there. Also of note, you may want to google "winter walleyes" and read some of the articles. Seems from some of the tracking studies, that wintertime walleyes can be tough enough to pattern on those shallower rivers and northen lakes, let alone fish that feed on deep open-water bait.