I recommended The Bent Fork for last year's dinner but it sounds like the place will be too small for this year. You might want to consider The Bonefish Grill in Greenwood - that will be definitely large enough, food was good and service excellent. I use it for my "victory dinner" after clean-up on the last day of the show as it also opens late (or rather they've never kicked us out).
The Bonefish is part of the Outback family along with Carrabba's. Bonefish is probably the snootiest among the three restuarants, but I think their also the highest priced without a consummerate jump in quality over the other two. If I had to eat at one of the three, my order of preference would be:
1. Outback
2. Carrabba's
3. Bonefish
And don't get me wrong, I'm an Outback fan and would eat there any day. You can pay far more for a steak and do far worse.