Combine the ingredients for the rub in a resealable container, mix and set aside.
Whisk the injection ingredients in one large bowl until the sugar has completely dissolved.
Prep your wood as necessary and building a fire in your smoker for indirect heat. Aim for a temp around 225 degrees F.
Prep the mop by combining the ingredients and placing in a resealable container or clean squirt bottle (my preferred method) for use through smoking.
Rub the entire pork shoulder in a heavy coating of the rub. Place pork, skin side down, in the smoker and cook for 14 to16 hours, depending on the size of your shoulder and heat in your smoker adding wood as needed to maintain temperature. Using the mop, baste the pork at about 13 hours and again every half hour until done.
The pork is done when it temps at 195 and easily pulls from the bone.
Allow the pork to rest for 30 minutes in foil before carefully removing from bone, discarding fat, and serving.
Serve with a vinegar base sauce and chopped slaw.