[SFM5S159]

All the above tips are good ones. I would add a few...
You may know this, so forgive me in advance if you do.
Find someone to follow to get the "line" down on the track.
Get all of your braking and shifitng done in a straight line for the most part. You don't want to upset the balance of the car while turning. As a first-timer, I would also caution you to not make sudden movements of any type.
For example, even though it may be against your instincts, don't brake hard if you feel things start to get loose in a turn. You will/can cause the weight to transfer to the front of the vehicle and things could get worse. Brake a little OR if you just got off the gas, you can always get back on it and get that wieght back on those wheels!!! Think of your car as if it were balanced on a single point in the center. Everything you do will cause it to go one way or the other.

Get new high-temp brake fluid in the car, torque and document the lug nuts. Use the Water Wetter product(I always use distilled water with it).

Stay on line, and try not to worry about the a-hole who will get in your ass because you are slower. DO NOT TRY TO SPEED UP. Stay on the line and let them pass in the proper zone.

Yes, SAAC may let those guys who participate in the vintage race on the track at any time in any session, and I bet there will be more than one of them who will get out there to get as much seat time as possible on the new track.

Most of all, be safe and have fun!!!

MC