I'm sure it goes without saying, but you are gonna want to use the Minion Method for burning the charcoal so you can get a relatively unattended long burn. You might also want to try the clay pot base or sand mod so you don't run out of water in the middle of the smoke.
Brisket is a candidate for stronger flavored wood chunks too -- oak, hickory, mesquite, etc. I like oak.
Done is not a matter of time or temperature with Brisket, but they are both good guidelines. Done is when the meat seems to jiggle and a probe goes in without much resistance.
You will be amazed at how easy it is on a WSM.
Edit: Well hell, I just re-read your post and you have a lot of experience with briskets on a WSM -- Disregard my entire post LOL
