What did you/are you planning to wear as far as undergarments? I am getting cups sewn into my dress so I won't need a bra, but did anyone wear shapewear like Spanx? I guess it depends on the dress, but if you wore it, was it comfortable all day or did you find it unnecessary after the fact? I was also trying to keep in mind what would make it as easy as possible to use the restroom in a huge dress!