A few suggestions:
From the looks of it, we will have between 6 and 8 tables set up for us in the room if we go with the banquet seating. I imagine we might get more tables if we snag some of the rectagular ones as well.
As I figure it, that gives us 6 tables to fill at any one time (I figure game coordination can have a table of their own, and we might want to have some small space available for anyone who wants to set up shop to sell). Any other tables we may have should probably be put to use for pickup games and socialization.
As for the timeline of the thing, it might be a good idea to have 3 time slots: 10-2, 3-7, and 8-12. That gives us all an hour for meals (and an hour to finish up a long running game!). That would give us a whopping 18 games to run over the course of the day (and if the average game is made for 6 players, then we can have over 40 people playing from morning til night). More than enough gaming to go around (I for example, wouldn't mind skipping a time slot to just relax if it meant someone else got to play).
Anyway, I suppose that we should start thinking about doing some sort of pre-registration deal like the Chicago crew did - it seemed to work quite well, all things considered.