The biggest advice I can give you is don't be afraid to ask questions. It doesn't matter if it's asking where the toilets are to how to work on some advanced skills. Ask questions. It doesn't matter how long some of the guys/gals there have been doing it, 99.9% of them are more than willing and want to help.
A good example is the track day I just did this past Monday on Labor Day. I saw a guy who was at the track for the first time. I knew him from a local Austin message board and he was asking me where to get his chain tightened and a loose rearset tightened. (like a vendor/shop that was set up at the track that he would pay for those services

). I told him to pull around to our paddock and we would knock it out in about 5 minutes and he was like really? He never thought of asking any of the participants. There were about 60 riders there that would have done the same thing in a heartbeat.
Have fun and get ready to lose a lot more of your vacation days due to the track...