Cook chopped bacon in skillet over medium heat until done and crisp. Remove with a slotted spoon leaving baon grease in 10 inch cast iron skillet. Bacon slices can be cooked along with pieces, but removed when almost done.
Cook diced onion in bacon grease until transluscent and limp, about 8-10 minutes.
Stir remaining ingredients (including bacon pieces) into skillet and mix well.
Cook on smoker at 225 - 375 degrees, stirring gently every 10-20 minutes. When mixture is slightly more liquid than desired top with bacon and cook for last 10-20 minutes period or until desired consistency.
Notes
Store bought bacon recipe pieces can be substituted for freshly cooked bacon and the 3 strips left off the top if desired. If bacon is not cooked you can cook the onions in 1-2 teaspoons of cooking oil instead.Beans can be smoked at higher, lower or mid-range temperature depending on what else is on your smoker. Adjust stirring intervals and total time accordingly and cooking only until desired consistency is reached.