Hi there, Cali!
First, I want to give you and your fiancé a big CONGRATULATIONS! While I didn't honeymoon at the Most Magical Place on Earth, I was lucky enough to get engaged there, making for some truly magical memories.
Cali, you are absolutely able to wear your wrist corsage at the theme parks.
For even more
matrimonial attire, you can get wedding-themed Mickey Mouse and
Minnie Mouse wedding ears! This adorable matching set will let everyone know that you just tied the knot. You can even have them embroidered with your wedding date! While shopDisney appears temporarily out of stock of the Mickey Mouse ears, I have heard of them being available recently in the theme parks.
After my husband proposed to me, he surprised me with two Happily Ever After buttons that we wore for the rest of the trip. You can pick up these complimentary buttons at most stores in the theme parks or at your Walt Disney World Resort hotel front desk.
I hope that this helped, Cali! Please come back here to planDisney if we can answer any questions to help you plan the most magical honeymoon.
Best Wishes!
Sarah B.