I'm assuming October 24th is the day you want to do CRT. That's a Tuesday and MK opens at 9:00am that day (non-EMH day). I'd try to get an 8:05am ADR that way you'll be done with breakfast just before the park opens.
In 2004 we had an 8:05am on a day the park opened at 9:00am. We were done with breakfast at around 8:45am and waited at the rope at the back of the castle. It was nice to have a "head start". And, that's the morning we got to wake up Tinkerbell at Tinkerbell's Treasures! (Oh, and the CM didn't let us into the park until 8:00am even though a bunch of us were there around 7:45am. We were worried that we would be late for our seating but the CM said the CMs at the restaurant know we need time to get to the restaurant so not to worry.)
This morning I got the 8:05am for Sunday October 22 - the park opens at 9:00am that day so it works out great! When I called I just blurted out "Cinderella's Royal Table, breakfast, October 22, party of 3, earliest available time please" and got it!
Debbie