Why baked beans and not cowboy beans? If you have a propane burner on you smoker fill a pot with water add dry pinto or piquito beans and ham hocks, onions, rub etc. and let them boil/simmer while you cook. Takes about an hour or so and voila. Your customers will see you making them fresh and they taste great. Best thing about them is that they can be made on-site quickly and don't take a lot of attention.