Bring earplugs, sometimes festivals will provide them, but just in case it might be good to get your own pair.
Definite +1 to this. I shot a rock concert for fun a few months ago (just for myself) and my watch measured an average of roughly 94 dBA over 2 hours, which would have been in the danger zone had I not been wearing protection. Even just 20 dB of protection means an attenuation by a factor of 100, meaning that it would take 25 hours for it to be as dangerous as it is in 15 minutes with naked ears.
/u/photography-ModTeam
I tried, but could not find it. What should I search for?