What should I wear?
The theme is WEDDING!!!
You may wear anything related to this theme--including old wedding dresses or suits, bridesmaid's dresses that you haven't worn since, anything that is your interpretation of a wedding (Bride of Frankenstein, bride/groom from your favorite movie/book, etc). Or, just wear your festive best. Really, just wear whatever makes feel comfortable, bearing in mind that the Nola folk will likely be pretty decked out.
What is the venue like?
Music Box Village is outdoors in a tree covered area. Bear in mind that the ground is dirt. Also, it's May 31st, which could mean perfect comfortable weather, it could also be hot.