We just bought a master forge gas smoker. Its out seasoning right now. I bought 2 whole chickens to try first. I have one in a salt and water brine. The other I am going to use a rub on. I bought hickory chunks. The book says this is a strong flavor. So, how many do I use? The book also says that you get the most smoke in the first hour. So, do you add more after an hour? Thanks so much!