Don't listen to any belly aching. This is a cool place to see an outdoor show (went for Dave Mason, Doobie and Journey). Yes beers are pricey (same as every event/sport venue). Pre-party and/or have a few in the car then. Arrive early to get good lawn seat.
Food is just for fuel.
Yes, leaving can be a 15 to 30 minute wait (everyone is leaving at once!). Again that's why you need beverages in the car for post concert.
Bring in liter each of water no matter what.
They do need more Porta a Potties for the lawn though.
Rockin!