Unless you've done a ton of marketing and advertising, 100 meals might be on the high side.
Shoot for 50 meals, cook 2 butts, i brisket (wheres your ribs?), a full pan of beans and a full pan of coleslaw.
See how the first couple days go and then start adjusting!
My opening week was crazy but i had a ton of friends and family stop in plus i promote the crap outta my stand. Once they got tired of BBQ, you'll get a better feel for your real customers.
Sorry to rant but i only opened 7 weeks ago and am still pretty high from being self employed! (STILL!!!)
What is your set-up?
Pitmaster @ Lockharts BBQ
I cook the best brisket north of Dallas. Get over it.
Northern midwest director for OBR