Yes,just call the regular dining number.
I just made a reservation for 2:00pm on 11/12,which is our check out day.
DH & I decided we wanted to "keep the Magic" going as long as possible,so right after we check out,we're heading over to the Grand Floridian(from Caribbean Beach Resort) for the 1900 Park Fare breakfast,then,maybe ride the monorail,check out some resort gift shops,then have Tea at 2:00.
We probably won't get back home to Key West unyil midnight(6 hour ride,minimum), but it's worth the late arrival home