I'll speak for myself, I have no idea where to start looking for them since I catch then so rarely. Most of the ones I've caught were when I was either jig fishing or longlining for crappie or when I was fishing for bedding gills or redear. Kind of like sauger now. I used to troll for them in earnest but it got so hard to catch them anywhere but below some of the dams in the wintertime that most of us quit fishing for them. It is a pleasant surprise to catch one keeper size any more.