I know every year people come out with festival tips but these are the only that are going to be honest. Nothing will ruin your festival experience faster than an bad outfit choice.
FUNCTION > FASHION
When shopping for festival outfits remember it’s going to be hot and you will be sweaty. Rompers are hard to go to the bathroom in. Short dresses can get weird if you like lounging on the ground a lot. Look for light, loose materials that breathe.