CJ, I find them all in the creeks around here, if they're big enough to support fish. The flathead is a true river fish that has adapted to lakes, so he's at home in a decent creek. Channel cats have always been in the rivers and creeks, like bullheads. I consider blues to be true open water fish, but the lake needs to have a river running through it, or at least a few creeks. If your creek runs into a lake or a river, there would be a good place to fish, if the time is right. The blues, channels and flats will move in and out of the mouth of the creeks. Some will migrate farther up it, especially during spawn. Some will take up residence until the waters become too warm and depleted of oxygen. If you're looking for the biggest boys, don't go too far up the creek, fish in the mouth of it.