Or,you could spray your pork with vinegar[if you are determined to add something],sprinkle on the rub-until your budget runs out,and you don't wind up with half the mess to wash off your hands.
You can mix it with lard,olive oil,crisco,apple,or any fruit juice,V8,jack daniels,rum,etc.
I guess, I'm saying that we might be complicating a fairly simple process.
Experimenting is fun,but sometimes we can overwork the process.
Smokin' always advocates starting simple,take good notes,change one thing at a time.
We all,myself included,have techniques.
Sometimes, folks ,new to the forum,try to incorporate them all.
You can use most seasoned salts,or rubs,and a handful of brown sugar,a few minutes before you go on the cooker,set it at 225�,use an eight lb bone in butt,don't even look at the cooker for at least 12 hrs,take it out when the bone is loose,around 195� internal.
When you pull it,mix a little of Smokin's vinegar sauce,adjust for salt,and it will be the best your neighbors ever tasted.
I don't want to toss cold water on the event,but "try it, you"ll like it".
If it don't work,send me a bill and the pork butt.