mb168, I think you're ok, but i'M probably too late now. I would think foil will keep it moist and maybe help it cook faster. Mine stayed around 163 for at least 7 hours.I cooked a brisket (my second, a 5.25lb flat) a week ago. I woke up at 2:30, the temp alarm was going off and my fire was out.I drizzled some oil on two paper towels, shoved 'em through the bottom vent door, lit them and went back to bed. When I got up at 6:00, the internal temp was up to 163 where it stayed for the rest of the morning.My total cook time was, I think, 17 hours . I foiled, toweled and coolered it. It was fine. It could've been better but it was moist enough. My kids are picky eaters and they both had 3 helpings.