What Should You Bring/Wear?

Bring a dish to pass if you live locally, we are having a picnic style wedding. Wear dress casual attire for example for ladies a nice sun dress or summery dress for guys like kahkis and a nice shirt. Contrary to the RSVP card you do NOT actually have to bring lawn chairs! I realized that the RSVP card implied this but, it was too late to change it.