I don't have a zo6 but I would think as long as we're all careful of each others cars on the track..it would be cool...(that is if you let regular C5's participate!

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How about like they have done in other areas..
Two cars at a time..seperated by half the track..for 3 laps..then come in..the next two cars go...I think if done safely like this..you'll get more participation..
I've done the pocono drivers school event..with teachers in the cars..about 16 cars on the track at the same time..
Its not racing but its fun..but I thought..
I would suggest the two lap single or double car as an even better event..
I remember an event like this in Michigan or Canada..it looked cool and the participation of new comers to the sport is even greater..