overnight in the fridge for the dry run should be fine, most rubs don't have enough salt to start a curing effect, with those long times tho, make sure you're doing the 90 min mop down for exposure
even with the big bullet, how can you fit all? are you rolling up the ribs
i've done the ribs as crowns - can fit 8, but no butt -so i'm going to cut them to fit in the rack. this should be interesting.
also have a gas smoker on the grill i've never use - so could put the butt in there - getting ready to figure it all out now....