this answer only applies to the Rolex Motorsport Reunion Race. The admission price allows you inside where you can walk through the pits, around the track and sit where ever you want. I usually do not sit in the grandstands but I did for half a day at turn 5. The answer is free. My favorite spot to watch the race is turn 8- the corkscrew.
most tickets are for general admission so you can wander around and sit in any stand or bring a chair and sit basicly where ever you want.
Check out the map online and when you enter the track there will be a guide that sends you in the direction of your grandstand to park. Once you are in you can walk anywhere you please.
There is a circuit map on the website to let you know where you are.
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