I am a newby to this site and to smoking -- and I love both!! I have a question. I am planning a Memorial day picnic with smoked pulled pork and smoked spare ribs. Can I cook the pork butt the day before and reheat it on picnic day? Also, when you say to put it in a cooler, should the cooler have anything in it or should it be empty. I am becoming VERY NERVOUS as we move closer and closer to cooking day!!