I put whole 12 - 14 # packers in my 009, sort of roll the edges up to get it to fit in. I turn it on 225 about 9 PM and leave it alone until about 7 AM, when it crank it up to 250 to finish when the flat gets to 190 - 200. Usually gets done about noonish.
Smaller pieces of meat would get done quicker, & yes they can be cooked the day before & reheated. That is generally a lot less stress
