You used to able to use a small hp motor on portions of freezeout. Maybe the changed the regs. It was always a pain in the rear to use one though. There are no developed boat launches, its shallow and muddy so the water pump tends to plug. You can run a prop on the Mo, but your asking for trouble in most areas from gravel bars and rocks. Also a 10hp is really small for the larger rivers here. Look at some of the standing bodies of water i.e lakes and resivors. But watch it, when the wind picks up it can go from flat calm to 4-5 foot waves in minutes.
....its like taking x-lax when you have a bad cough. It wont clear up your lungs, but it sure stops you from coughing