BBQ turned out great Toad.
Made marinade of Dr Pepper, vinegar, ketchup, pepper, garlic salt. Let brisket marinate overnight. Rubbed brisket with a mix of cayenne, black pepper, garlic salt, cumin, paprika, and onion powder. Filled pan with plain water. Smoked over mesquite for about 11 hours with fat side of brisket up the whole time. Turned out fediddlein awesome. Nice red smoke ring around the edge, pulled apart with a fork, delicious! Also did some ribs for about 4 hours. Should have spent more time on them. They were good, but not as good as I usually make. I didn't marinate them or use a rub, I just smoked em and brushed some sauce on for the last hour or so. Still good as hell though. I've been checking out that Weber WSM website all day, thanks for the heads up.