We did one a couple weekends ago. I think I have the same grill as you but I don't have the side box, so it was pretty cramped trying to keep a 16# turkey on one side and not letting the coals get it too hot. We did a light rub and I used a combination of apple wood chunks and charcoal, and put a cast iron dish of water directly over the coals.
Honestly I don't really know what's recommended or even what I'm doing, I just put meats in and if they taste like smoke at the end I'm happy. The grill doesn't seal real well so the temps run away from me and then once ash collects in the bottom they plummet, so it's a constant game to keep the temp in check. I think I started around 11 in the morning and went until 5 or 6, it was definitely an all day event for that much food.