The job of making good bark is not for the impatient. Remember, good things happen to those who wait. Be prepared for the long haul since making bark is a long and slow process. This is due to the fact that you need to grill the meat at a low cooking temperature, for an extended period of time. The process will take around 10 to 12 hours, maybe more. In addition, cooking time will also depend on the size and cut of the meat.