I don't know what volume your thinking of, or if your doing sides, but pans take alot of room and kill airflow. go big as you can.
I cooked 100 lbs of pork this weekend, that wasnt any trouble in my stretch, but the 6 pans of mc and cheese, 6 pans of ziti, 5 pand vegies, 4 pans of meatballs, 5 pans of potatoes, 4 pans of shepards pie, all took alot of room and time to cook.
That was to feed 200. and it filled the stretch and a backwoods gater.
Fire & Spice Cook Team
Backwoods Authorized Dealer
Old weber gasser
Uuni pellet fired pizza oven