As far as my cooking method, I didn't foil at all. Basically I got the WSM up to temp (steady 225) using the Minion method and put the butt on (fat side up) at about 8pm. I flipped the butt over around 1am w/ the temp holding steady at 225. I stirred the coals a little and went to bed. I got up at 5am and checked the butt. It didn't seem like it was quite done so I left it on for another hour. I took it off just after 6am then I foiled it and put it in a cooler w/ warm towels. Pulled it around 715 before I left for work. The taste was good, but I would have liked it to be a little smokier. Everyone at the pot luck raved about it (there wasn't a single shred of meat to take home), but I feel like it could/should have been even better.
Also, there wasn't really any bark at all. It was almost like doing a pork butt in the oven, but w/ a slight smoke flavor. I felt like I used a ton of the rub and even added some before I threw her on. I used a rub recipe for Memphis Magic Dust, w/ a few modifications, that I found on another site that always tastes awesome on ribs.
I meant to take pics (I try to every time I smoke something for future reference), but I was so flipping tired that it completely slipped my mind! I'll make up for that this coming weekend as I plan to smoke a lot of meat for a New Years party.