SCCA has a building at the entrance to the track which serves as a registration building. Goto to the SCCA building, look for a line that says workers/members. Talk nice to the registrar, and they may give you a pass to enter the track. Tell them that you are interested in SCCA, you are considering becoming a member, and you would like to see what it is like. If they charge for the pass it may be as little as $5. The worse thing that could happen is that they say no.
Goto
www.cfrscca.org/forms/SebNatJan05.pdf to see when registration is open, and read the schedule and supplementary regs (page 3). Also print a copy of the schedule so you can see the order of the races.
Have fun. I was going to go there this weekend to dumpster dive for tires for my formula cars, but am going to Ohio tomorrow to pick up a Toyota Formula Atlantic motor for a car that I am crew chief on.