Not this time, but I have gone before and it is a really nice casual atmosphere.
Some people bring tables and have a "spread" of food. Lots of people bring their lawn chairs and small coolers. There is room up front to dance. I recommend lawn chairs because there are rows of benches in a semi-circular pattern, but they don't have backs... Just flat benches. The bathrooms are REAL bathrooms, they're close by and they're kept clean.