Hello, I'm smoking a brisket for the 1st time in my Masterbuilt smoker. The brisket is 8 1/2 lbs. There's a homemade rub on it and I expect to be up at 3 am to throw it on the smoker. I plan on using Hickory wood chips. ( unless someone tells me otherwise). The question is should I soak them or just use them dry? How often should I put in new chips??