you run againts who ever is next to you, or you can race a mate etc.. joint day is to make sure we get the numbers. these days arnt too common so it will fill up for sure.
a note for the noobs, last SAU drag day was my first and you get more experience in this one day as 10 visits to WSID on a wed night.
All up last time i got in about 37 runs last time, and the stress on the car was 1/4 of the amount of a track day.