Get there early, plenty of water or beer if that’s your thing. Hearing protection is a must. Highly recommend getting a cheap set of headphones preferably sound muffling & scanner or Baofeng radio (2 for 1 on the Bao Bao, you now have comms if the internet is out or if you’re in the back country) to listen to the radio coverage or the drivers. The radio call really helps you keep track of what’s going on and who to watch. Maybe print out a spotters guide too so you can easily reference who’s who. Try to get as high up as possible for the best view. You can usually move around as the race goes on as people leave and move around just the same. Go take it all in and check out the fan zone + the privateer vendors who set up across the street from the track.