The SD chapter puts on a really nice event. Huge parking lot allows for nice long runs. I've seen layouts in the 90-100 second range. I used to go a few years back. But the drive there and back got to be too much. Plus with a large course comes a lot of cone shagging and standing around during the work sessions which my knees started to object to. But you should have fun. As I said, they run a very well organized ship.
