I haven't yet decided all that I'll be bringing with me/wearing, but I thought I would check on a few of my options to be 100% certain that they would be acceptable. I have this black dress that I wore to my cousin's wedding a few years ago. I don't have an exact picture of it (that I feel comfortable posting), but I've found a similar dress here
. The only difference is that the neckline is rounded, and there are no sleeves, and it might hit just a little bit higher on the leg (just below the knee, if not mid-calf).
The other option I was considering was my fancy Renaissance dress
(minus the sleeves, since that can make it unbearably hot). I have a few different chemise/blouse options to wear with it, and might even buy/make a new one, depending on what looks best and such. I haven't decided on shoes for either dress, but I'll make sure they are up to par beforehand. *nods*