Wesley,
I did two butts and a brisket flat this past weekend. It worked fine. I guess the timing of each being done would depend on the size of each piece of meat. My flat took about 9 hours, and the butts went about 14 hours. I think there are some previous posts dealing with this subject, you might try the search function and see if you find some useful information. Congratulations on the new smoker and good luck!
Wayne