I spent a good chunk of my teen years in Leavenworth, just North of KC. I did a lot of catin on the Missouri. Look for the exposed wing dams that go the farthest out into the river. Google Earth would be a quick way to find them. If there is a creek that flows in by the wing dam even better. For flats and blues I liked creek chubs(have to catch your own), but cut bait and worms work alright for channels in the slack water(flats move in there at night). Using worms will catch you all kinds of things just like any other river system, so if you just want cats leave them at home. It might be different now but if you want to fish with anything bigger than a minnow you might have to it catch yourself. If you fish the current be prepared to lose a lot of gear. Heavy sinkers(8oz. or bigger) help, but you will eventually end up in the rocks and have to wait fo a fish to pick it up. I always loved fishing the MO. Hope to get back there one day. Huge cats and you can have a whole strecth of river to yourself most days!