Keep trying to get a reservation, but if you can't then go there in the morning and see if they will take walk-ups. You might also try again a little later. You might get lucky. We have done BBB several times. We only did it at the MK location. DD's appointment was always around 10:00 or 10:30. We go during moderate crowds. I'm sure they were booked full for callers, but probably at least half, or maybe more, of those times we have seen them take a walk-up or two. I do remember once they turned people away. Can't hurt to go ask if you can't get a reservation ahead of your trip--- just know that it is a long shot. I wouldn't give up trying every day to pull a reservation. Actually, I would probably call a couple of times a day if possible, because it is going to be the luck of calling right after someone has cancelled.