I do 1200 people every fall at an event. I set up 2, 2 sided buffet lines and it takes 40 minutes to get them through. I did 1600 at a different event last year and it was pulled pork and sides ONLY, for everyone. You will work your arse off.
I would take Pulled Pork for 1200 (300#'s) and Brats for 1000, 3 sides and go. You can buy a Johnsonville Pre-Cooked brat called a Sheboygan. Restaurant Depot can order them. They are very good and will heat up in 45 minutes if you run short. Start with maybe 300 brats hot and play it by ear. Heat as you need and freeze what u don't.
2013 Insane Can Posse Tour
Gateway BBQ Store
Blues Hog BBQ Company
Plowboys BBQ Company