Free beer would raise a bunch of flags with the lawyers, both KCBS and the event location. It just won't happen because of liability.
Apps and a cash bar while the awards, raffles, etc. is more doable. It would be better food and easier to manage. Plated, rubber chicken dinners are, at best, last resort.
I have been involved with planning conventions and dinners as both a payer (corporate) and a provider and there is absolutly no way to satisfy anyone with a plated dinner or a buffet dinner if the number is above 100. Some one should consult with one of the TOY guys, he has experience that could/should have been tapped.