AHC: Avoid the Woodstock 99 fiasco

How would you make it so that the various problems that led to Woodstock 99 getting the reputation that it did not happen?
 
Allow attendees to bring in Food and Drink
Reduce the prices of the vendors (According to Wikipedia Vendors sold burritos sold for $10, hotdogs and sandwiches sold for $5, a 10" pizza sold for $12, and 20 US fl oz (590 ml) bottles of water and soda for $4 each) The Vendors paid 500 to sell on site. So I suggest reducing the amount that the Vendors were charged.
More Toilets on site.

Not sure what to do about the Rapes and Violence.
 
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