One of the great perils of packing to go to a music festival is needing to cover any eventualities. It's usually the height of Summer, so you want shorts, vests, and a light wardrobe. It's also bound to rain at some point, so you need wet weather clothes. You hope and pray that it won't turn into a mud bath, but you need to guard against that as well. That isn't how it used to be. The rain came down at Woodstock, and nobody cared at all.
It might be down to the free-spirited nature of the place, but the festival goers seemed to welcome the rain. Nobody changed out of their sunshine outfits, and indeed some people took it as an invitation to take it all off and dance naked. Skinny dipping had been observed in and around the festival, with nobody judging or being judged.