Hey Fan, when you have a minute, go to the poultry section and search for "crispy skin." You will see that this topic has been covered extensively! Not trying to dodge your question, but there's no need to reinvent the wheel on a question that has had an incredible amount of discussion. Search, and you will likely find more answers than you bargained for!
My advice? Don't worry about crispy skin. Go for the quality meat beneath, and the sooner you give up on crispy skin in these smokers, the sooner you will be at peace.