These days are put together by some of the principals of the raceway. They fit them into the schedule where there is the least demand, so they are usually on weekdays. I went to a benefit for another rider several years ago and it was a really well put together day and much fun. If you are thinking of going I would recommend doing it.
Its been years since we have done track days, but Dave Stanton was one of the names you heard often, and always as a good guy. I'm considering just going as a spectator to hang and do some bench racing. See people go fast and smell the race gas..