Yes, you will need a vehicle pass, unless you tent and drive the vehicle away to a parking space (there is a shuttle to help you do that if you are inclined). It is going to be very, VERY hot if you are not in the shade, and this year probably even if you ARE in the shade, and shaded spots fill up right away. So, bring some squirting-water fans and sunblock.
You get to choose your own site, but the early birds get the best ones, and some will already be filled by the song schooler students. So arriving early is always a good policy. There is also the ritual of trying to get a good audience tarp spot in front of the stage- a midnight wait-in-line and get-a-random-number, which determines where you stand in line the next day. Not everyone participates in this, but numbered people line up first.
Good luck and welcome to festival!
Becka
Listening to:
my dog snort and roll on the floor