1%...
There was no "splitting up" of folks due to events. The autocross involved far more folks than we thought would show up, and their multiple runs showed their interest. The ONLY concern was the last minute shrinking of the course--which can be dealt with in the future. The SCCA, as always, did a great job. I think the only conflicting event was a Porsche rally, which kept some folks from attending.
As I've set forth in another thread, I think one day (or half day) of "hot" driving activities is enough. Let the rest of the time resort back to the traditional Fling. Everyone gets some of what they want.