Hi Kristy,
Be Our Guest is one of the most popular restaurants at the Walt Disney World Resort! Everyone wants to travel inside the Beast's Castle to have a meal, see the West Wing and dine in a castle.
First, keep trying for reservations. Guests are always changing their plans so you never know when a reservation may pop up.
Second, random guests are emailed invitations to join for lunch. These are mailed to guests about two to three weeks ahead of time. Since it is still in the testing phase, there is no guarantee if you will receive one.
Finally, go first thing upon arrival to the restaurant and see what availability they may have. Depending on the day, there may be openings.
Wishing you a magical vacation!
Beth