Thank you all for your feed back, it is greatly appreciated.
I'll try to answer the posed questions, but let me say that pulled pork was my choice, as margins are higher than say ribs or brisket. Also, as mentioned, it does freeze well and I could easily use the leftovers for other gigs or kids' lunch, baked beans, etc.
The event goes from 1pm-7pm. The event is in it's 7th year and last year they had over 1000 people attend. They have only ever sold hamburgers and hot dogs. 2 ice cream trucks also vend.
Its a family affair from my standpoint as wife and kids can and will help out, so labor costs are minimal.
Is a 4oz sandwich the standard, or should I go bigger.
Once agian thanks for all your help.