I used 4 chunks of hickory with a mix of lump and briquettes. I use a rub that I found online from the BBQ brethren. I'm a fan so far as I use it on just about all my cooks. Steaks, chicken, ribs.. And now a Boston butt.
The pit temp was just over 100 and I didn't take an internal meat temp. I suppose I'll jus keep cooking until I get to 195.