Anyway, we are going super ladylike for this activity. Pimm's Cups and juleps all the way. The hats in Polyvore did not really do it for me. I see you in either the Sunshine Forever hat or the plum Diana Derby from Maggie Mae Designs.
I would go for the Fluevogs because I think they'd be more comfortable, but you might prefer the heels and a chilly look for anyone who crushes you or steps on your toes.