Tix:
http://www.roadamerica.com/Races/RaceInformation.asp?id=30
The Runoffs rock. Here's some of last year's racing.
http://www.speedcasttv.com/scca/#/races
Click on "View All Races".
The Runoffs is actually the National SCCA club racing championship. Before NASA came along, it was the only National Championship for amateur road racing in the US. Originally, the SCCA Nat Champs were won on points, but in the mid-1960s or so, the club figured out that amateurs don't have the money to criss-cross a country as big as ours. So, they tried something else. If you're one of the top four or five guys in your area of the country, you get invited to the Runoffs. Points these days just get you to the race. Once you get there, it doesn't matter how good you did that year.
It's a berkeleying shootout! Whoever wins the race IS the National Champion in that class (and SCCA's got more than twenty of them, so there's three days of racing), no questions asked, no excuses accepted.
I'd be going, but I forgot they moved it from October to September, and I can't get the days off work. The Runoffs were my yearly vacation (I was lucky as a youngster, it was held at Road Atlanta from 1970 to 1993) even before I joined SCCA.
And when I was a Corner Worker, it was the yearly "family reunion". To a worker, it would be like if the Super Bowl lasted three days, they handed out free beer at night, and let you sleep in the stadium so you wouldn't get a DUI.
I vote Runoffs. I haven't been to the Jefferson car show, though..so somebody voting that way will have to tell you about it.