Ed... 225 to an internal of 195/200dg will give you a more tender BB and will run around 16hr + or - time wise. Allow 1-2 hours for hold over which allows the pork to soften and loosen which actually makes it moist and tender.
Only change I would make since you asked, is to lower temp to 225 and wrap after stall[about 10/12 hours in] and when temp starts to climb up to about 175/180 ... add some liquid of your choice, double wrap in foil and pop that BB back into the smoker to finish. Don't forget to add a source of water to start the smoke as it keeps the smoke moist and you'll be good to go. If your shooting for a finish time allow aprx 16hrs+2hrs and back track. It's better to hold over wrapped than to pull early to meet a dinner deadline.
All the best Ed and let us know how it goes for you...