If charcoal cooking put the butt on a rack in a pan then.If I foil a butt at 150-160F, by the time it reaches pulling IT, there will be plenty of juice that will be added back to the pulled pork. Where do you think all this juice goes if no foil is used? Silly.
Yea I like cooking on the grate better also. I know not all cookers can do a drip pan below but it's ideal when you can...no need to mess with foil and messing with the bark.I actually prefer to cook my butts on the grate and then foil vs cooking in a pan. I want some of the drippings to add to my finishing sauce and add back into the meats, but I don't need a full pan of it.