A high school prom requires as much coordination as a wedding. Reserving a banquet hall, decorations, feeding people, a DJ. Same stuff. Proms are organized by a handful of zit-faced teens with learner's permits and they seem to do a pretty good job. Most of the time.
Weddings, on the other hand, are managed by highly paid would-be-realtors who talk couples into getting sterling silver flatware and, somehow, find that rewarding.
You can't create a fairy tale. So, stop trying so hard. People are starting to feel uncomfortable. Surprises, flowers, and centerpieces are details that even your most spiteful, jealous ex-sorority sister won't notice. You're not being judged by your cake or your dress. You're being judged by that already-fat oaf you're marrying. Remember that.