Hey guys, first time smoker. I borrowed a smoker to use, it has an side firebox. I was planning to use either briquettes or lump as my heat source and then hickory chunks. I have two 8.5 lb butts and figure about 12 hours at 225. My question is, how much charcoal do I need to sustain 220-240 degrees for 12 hours? I apologize if this has been asked before (I am sure it has). Thanks in advance.