Alright. I've got a Brinkmann trail master vertical. It ain't fancy, but it does the job. Inside, it is 3 grills above the water pan, and 3 meat hooks hanging from the top.
It is a charcoal smoker, so I usually fill the bowl up with kingsford, and add a couple wood chunks of whatever...usually apple or hickory.
Anyways, I don't use the hooks for anything but links. For a pork butt, well, and brisket, I put it on the top grill to get it as far away from the heat source as I can. One probe in the meat, one on the grill to show air temp at the same location the meat sits.
When I load up the bowl with appx 5 lbs of charcoal, I can get it to hold temp for about 5 hours so long as I'm not opening the door too often. But, I smoke butts at 325, which means bottom vent wide open. I leave the water pan in to catch drippings (to prevent flare up) as well as a heat shield. I don't add liquid to it for pork butts...they have plenty of moisture on their own. Brisket is another story though.
So, at 325 and a medium size butt, I usually have to add fuel once.
Once internal temp gets north of 190ish, I check the bone. If it is ready to pull right out, it's done. If not, let it sit. Some butts are done at this temp, some have gone to IT of 200+ before they are ready.
Am I missing anything?