Haven't tried that one, but last trip down we wanted to make a PS for Chef Mickey's - any time for breakfast. Fully booked but they said we could try anyways. We were seated within 1 minute when we got there. As you are trying to do a Princess meal, I would try to book it a day before when they release the cancellations and if that doesn't work, try to just walk up. I think you'll get in so long as you're flexible!