I found my dress .. but I don't know about the bustle. What exactly is it? The David's Bridal employee stated that they could pin it up in the back, but is my dress supposed to stay up like that all evening or is it just for the dance? I love my dress and the length of the train so I don't really want to pin everything up but I don't want to trip over my dress either during our first dance nor walking down the aisle! Help!