that schlitz will work just fine! the flavor of that sauce really compliments pork BBQ, and i can't thank rivet enough for sharing it with me. it's a winner!
remember, when you open up the foil, the shoulder is going to pretty much fall apart on you, so open up the foil with it sitting in a big bowl or something. the shredding/pulling will pretty much happen on its own and it's hard to resist the temptation to pick at it!