bluengold... you dont have to be an SCCA member to race... its $35 for nonmembers. the deadline on their site is for preregistration... if you know you're going you can preregister there and it will just save you a little trouble the morning of. if you dont preregister you can absolutely sign up the day of the event. just make sure to get there plenty early because once they get started things really move along. you'll need to leave time to get your tire pressures set, inspect your car, pull all the junk out of it, etc etc, and also to go sign up and pay and put your numbers on your car and all of that.
i'll add you and tehwagon to the list
bryan