As for settings, DON'T assume that 1)VR/OS (if you use it) is switched on, 2)is set to Normal not Active, 3)AF is set to AF-C, 4)the settings you use on one day will magically have reset themselves to the correct ones the next, especially if you don't look at the first day's results before heading out the next...
If possible, decide on panning shutter speeds etc. during practice or qualifying. Speeds will be broadly similar to race speeds so you can get a good idea as to how much wheel/background blur you'll get at assorted speeds. Chances are that once the race is under way, you'll be busy shooting rather than reviewing and changing settings. Don't forget to use your Mk1 eyeballs and bone encased memory as well as your camera.
As for locations round the track, have a look at Google Earth and see what's been shot from assorted spots round the circuit. With a bit of luck, some people will have made sure that they've dropped their pins accurately rather than just plonking them somewhere near the spot.
Enjoy the trip and race!
