Hi Jill, welcome to the Disney Parks Mom's Panel!
Besides the wonderful activities you have already mentioned, I suggest enjoying a dinner at one of the
Signature Restaurants at Walt Disney World. California Grill, Jiko - The Cooking Place, Artist Point and Yachtsman Steakhouse all have proved to be excellent dining experiences during our Disney vacations.
To celebrate a unique 25 Anniversary, I have to suggest visiting
The Pirates League. This is a really fun family experience that allows guests to learn the ways of Captain Jack's Crew.
Of course that your family will look really funny walking the parks and visiting restaurants with a pirate or mermaid makeover, but is not that what Disney is for!
The photos and memories from this childish experience will be as unique as they come and were else can you celebrate your anniversary and welcome the New Year as pirates.
I have personally enjoyed this pirate experience during my birthday and my kids were really happy that I got a makeover as theirs. Not only were Disney Cast Members thrilled to see us all as pirates and mermaids, but they were happy to share the fun with us.
Disney is my favorite place to enjoy life to its fullest and invite others to do so.
Disney's PhotoPass+ is a great service that allows guests to capture most of their memories during a Disney vacation and it may be a great addition to your visit.
Thank you for visiting and letting us help you plan a magical Anniversary at Walt Disney World.
Hope to hear again from you.
Miguel