Because CRT is so hard to get, you don't usually get a lot of choices as to times. If you want breakfast, I would pick a day that probably won't have morning EMH and try for the 8am seating. If you can't get that then I would try for the last breakfast seating so you can get some rides in after RD. If you want lunch, I would try for whatever time is closest to when you usually eat lunch. If you belong to either touringplans.com or TGM, review those websites for the best days to go to MK to determine which day to make your ADR. Good luck!