I could do an entire week's worth of posts on the dressing disasters I see among wedding guests.
#1 - Shoes
I can tell you that if there is a noon ceremony and the reception isn't until 6PM, then your feet are going to be hurting before the cocktail hour ends. That is why I love these: fold-up ballet flats by Fit in the Clouds that can fit into your handbag. For only $22, I think they are a total bargain and much more chic than going barefoot.