I will do it at 225 for 10-18 hours (It varies a LOT depending of butt size and weather). I like to mix fruit woods like apple and cherry for pork. I cook boneless until it feels like it is going to break apart when I pick it up with tongs from an end (But not over about 190-200 degree on a meat thermometer). For bone in just cook until you can lift the bone and the meat on the long edge drops away from the bone.
It is important to trim the first layer of fat and the false cap off, leaving about 1/8 - 3/16 inch of the fat under the false cap (I would check the youtubes) otherwise your rub will only flavor the false cap.
I use a mustard slather on the washed meat (Usually Yellow mustard with a little apple juice but I am going to try apple cider vinegar this time). The mustard does not really impart a mustardy flavor, it just holds the rub and keeps the meat moist
I then add rub until coated but NEVER actually rub it in, just add enough for a nice even coat
Cook fat side up the entire time. For the first half of the cooking time (Ya gotta guess) cook undisturbed then turn it 180 degrees and spray with moisture (I used to use apple or other juices, I’m not sure what I am going to use now, perhaps watered down apple cider vinegar?). After half of the remaining cooking time turn it 90 degrees and spray again. After half of the remaining time turn 180 degrees again and spray. I often spray every 45 minutes after the first turn if the times will be long between turns)
So if you guess it will take 12 hours to cook you turn at 6 hours then 3 hours later then an hour and a half because the food cooks faster as it warms so this results in each side getting an even amount of cooking if you have hot spots (Which you always do)
Once it is done you can pull it off and let it rest for half an hour or until it is not too hot to handle then pull with tongs and a large fork.
I like to then vacuum seal bags for the freezer then you can just heat by boiling the food saver bags
edit: Pro Tip, If you are having an event where guests are around the smoker allow at least two hours more cooking time because guests will, inevitably, open the smoker to see whats cookin. Every time you open the smoker you add 15-20 minutes to the cooking time