I asked this last week, I got one answer of maybe....we have a reservation next Saturday so I f you have success wit this I would sure appreciate your up
dating. Good Luck =-)
I went to HB the morning of our reservation and she took my info and the new time I wanted to pick up. It was super easy and we got the same Fantasmic FP time I wanted. On a side note, they were incredibly nice and let me substitute off the regular menu for one of my picky eaters.
How early/late are you proposing? I've done it up to 30 minutes late with no issue. I had someone behind me try to check in an hour early and the CM told him to come back later. It might just depend on the CM.