Well the chuck smoke went pretty well, although I havn't sampled yet. I'm shooting for a late lunch today with it, with baked taters for a side.
I was quite surprised at how short of a cook it took to get them done. It was 5lbs, and I put it on the WSM at 9:30 last night, and the Maverick alram woke me up at about 3:00 AM with a 203F internal temp. I can only attribute that to either higher temps (chamber temp was at 283F when the alarm woke me up, but was at around 230F when I went to sleep) or that this was a flat roast, about 1 3/4" thick. I dunno for sure, but they looked and felt great when I rubbed the sleepy dust from my eyes and pulled them off. I've been holding them double wrapped in foil and in two bath towels and in the microwave (not turned on, LOL!) since then.
BTW: I got this meat from Costco, and it was sort of like two seperate flat sections connected at one end. That connection broke during cooking, so it's like two 2.5lb flat chucks really.
EDIT: It came out really good, I was happy, as were my parents that I cooked for. Although I found it to be just a tad tougher than I'd hoped, it was still great. Maybe next time I'll pull it a little earlier, maybe at 195F or something. But all went well, thanks everyone!