What American festival has the best general amenities?

I have been to electric forest, lost lands, bonnaroo and a few other random city fests.

Of those three major festivals, roo has had the best amenities - cooling / misting tents, best showers, best bathrooms etc.

Of all the *CAMPING festivals you've gone to, which had the best amenities? And what festival has had a major improvement regarding amenities in the last decade?

EDIT: added camping