I saw a lot of people walking around with DSLRs without any media wristbands. Either the security sucked ass or Coachella realized that they're merely a harmless accessory nowadays. Were you able to bring yours in? What did the security say?
Also, was sunscreen not allowed? I would expect a festival held in the desert would be a little more lenient about allowing these type of liquids in the venue. I saw a girl that was given an option to either empty out her sunscreen (So she can carry an empty bottle around? -_-) or throw it out at the gate by security.