Hi Anne!
Congratulations on your wedding anniversary! I'm so happy that you all get to celebrate this momentous occasion in such a special place!
You could certainly attempt to get through part of the World Showcase in EPCOT that afternoon. However, once you consider the time it could take you to get checked in, settled in your room (if it is ready by that time), travel to EPCOT, and travel back to Downtown Disney for your dining reservation at Raglan Road, you may want to think about something that would be a little less hectic and kind of "ease" you into the Disney magic!
A couple of ideas would be to enjoy the amazing pool at your Resort for a refreshing afternoon swim. This would definitely help you work up an appetite for the great meal ahead.
Or, you could head on over to the
Downtown Disney Area for the afternoon. There is so much to do there! I'm sure you'll find plenty to do to keep you busy until your reservation, and beyond! The shopping is excellent and plentiful, and there is also plenty of entertainment, such as DisneyQuest (an indoor, interactive theme park), and the AMC Downtown Disney 24 theaters, so you could catch a movie!
Also, November 11th is the final day of Disney's
Festival of the Masters at Downtown Disney! This is an awesome open-air art festival, featuring award-winning artists and entertainment, held at Disney every year. We always LOVE to visit during this special event!
Whatever you decide to do, have a magical, amazing time!