Butts are pretty standard and easy even if they do take a while. Most people smoke it unwrapped between 225-240f until they get the desired color(bark - approx 5-6 hours)) and then wrap it in double layer of foil. Smoker temp can then be kept the same or raised up closer to 300f to speed things up a bit and then cook to an internal temp 190-200f. Get everything prepped the night before so you can get that thing going early in the morning as it will take 10-14 hours.
I trim as much fat ass possible off the outside to get as much bark as possible. I even trim down in between the three different muscles a bit to be able to get rub down in there.
Here's BillBo's rub from here on the forum
A lot of people put finishing sauce on the roast when done. It's a very light vinegary sauce. Careful not to put any on meat that you won't eat the same day because if it sits in that sauce overnight, the meat will taste like vinegar the next day. You can change the ratio of brown sugar to vinegar to tone down the vinegar taste but overnight, it's still going to impart the vinegar taste.
Here's a forum search for '
finishing'.
https://www.smokingmeatforums.com/search/1291577/?q=finishing&o=relevance&c[title_only]=1&c[node]=100
SoFlaQuers has a pretty good finishing sauce.
Happy Smoking!