About a month ago I bought my first WSM 22.5" smoker and I absolutely love it. I have a number of very successful cooks (or at least my friends think it was terrific) under my belt but I have a question. When reading through the posts I see many folks talking about only using 3 or 4 chunks of wood during a cook. This seems like a small amount to me. I seem to be adding wood many times during the cook before I wrap the Butts. Am I just wasting wood? How much do most of you use when cooking Boston Butts?
Here's a quick pic from this morning before I put the next batch on.

Here's a quick pic from this morning before I put the next batch on.
