13 hours was the total cook time. I did wind up bringing the temps up a bit to push it through the stall.
It came out pretty well. The flavor was delicious. It was a touch dry but not too bad. I'm wondering if it was because I pushed it by raising the temps a little? I did have it around 300 - 305 towards the end. All in all though I'd call it a success for a first try but I think I need some more practice.
Still some more learning to do on the pork shoulder cook but it was worth the effort. Thanks everyone for the advice and tips.