Bob, with the #2 you'll have to load baby backs sideways to get them to fit, or as mentioned use the hangers. I haven't used the hangers yet. Somehow I know they ribs would fall off, it's my luck.
Lots of good info so far. I've used 5, 2-2-1 & 3-2 methods for my baby backs. No real noticeable difference. Chicken is a straight 5 hours, no peeking, no nothing. Stuff the bird with a halved citrus fruit, rub it down and let it go.
Wood, wood, wood. Makes a difference. Remember, less can be more, especially with birds. I've goofed a lot of smokes with too much wood, and then I get an ear full during and after.
Have fun, enjoy it. Look around the site, there is a ton of good information.