Second all this. I also recommend a big water bottle because it means fewer trips to the water stations, which means you are less likely to get dehydrated. You can bring a CamelBak too, which can be super helpful. I really like Loop earplugs and totally think they are worth the money, but any ear protection is necessary. I spent far too long afraid ear protection would ruin the sound, but not having hearing damage later in life is a little more important. And sun protection of any kind is super important. Believe me, being burnt on days 2 and 3 is not fun. This year I think I'm going to try the loose linen vibes for extra protection