Hey there Carla and welcome back to planDisney!
It sounds like you've planned a very magical day for your family. Kicking off a Mickey's Not-So-Scary Halloween Party night with a meal at Cinderella's Royal Table was a stroke of planning genius! I tip my Minnie ears to you.
Unfortunately, Guests who only have admission to
Mickey's Not-So-Scary Halloween Party won't be allowed into
Magic Kingdom Park until 4 PM on their party day. But hope is not lost. Here's what I would do to try and keep things as they are.
Option 1. Check to see if there are any reservations for
Cinderella's Royal Table after the designated entry time. If you can adjust to a little after 4 PM the whole situation just got that much easier.
Option 2. If you can't move your reservation. I would be sure to get to Magic Kingdom Park and be waiting to enter at 4 PM. In my experience, most of the restaurants on the property sometimes offer a little grace to Guests who are a little late although you may have to wait for a while to be seated. Sometimes due to it being particularly busy Guests can lose their reservation. It will be ultimately up to you if you want to risk it.
Pro-tip: If you decide to cancel that reservation, keep your eyes peeled for a new one. Guests cancel all the time for any number of reasons and you may just find one for a time that's safer for your party.
Carla, I'm wishing you all the Pixie Dust possible on your upcoming vacation. Have the spookiest time at the party. And if you have any other questions please feel free to
come back for another chat!
Happy planning!
Taylor