Thanks, everybody!
I've packed up the other stuff to return to Zappos, but the sandals are definitely staying, and I think I'll keep the VC green patterned dress too. I think it will be a nice piece to bridge casual-dressy occasions, and I think it even works well with a black jacket and black booties to get multiple seasons of wear.
I still have a couple of dresses being delivered to try for the wedding, so I'll give them a shot, but it's really good to know that I already have a solution in my closet in the form of my floral dress. I can wear that with the Rockstuds, a pretty clutch, and perhaps a new bracelet/cuff, and be good to go!
I could see wearing the VC patterned dress for the rehearsal dinner. I bet it would look good with my black LD Tuttle sandals.