While it is not a perfect science if you love good crispy chicken skin, here are a few things you can try. One) Dry out the skin of the chicken either by letting it sit in the fridge for a few days, patting it dry, or using a hair dryer on cold. Two) Up the temperature of the smoker significantly for the last ten minutes. Do this before it comes up to temperature, not after, because you don't want dry meat. Three) Pull the bird early and throw it in a hot oven on broil for ten minutes. Again, do this before the chicken is finished cooking and not after. Four) Throw the chicken halves in a hot skillet with hot oil for a few minutes to crisp up the skin.