There are no guarantees.Calling at 180 you have the absolute best chance of getting what you want, but if you don't it's not the end of the world. There are other choices, and no matter where you eat you will still have a great vacation if you don't get tooo hung up on not getting in at a particular place. We have never been able to secure a Mama Melrose fantasmic package, even at 180 +10, but have had some fabulous dining experiences just the same. You will be fine!! We planned our upcoming trip for MArch, but due to some issues at work, had to change it to november at a little more than 3 months out. I was upset becuase I am a super planner and ALWAYS book at 7 am on 180 days. I thought "I'll never get us in anywhere decent to eat" When i first made them I got decent ressies and thought "We'll be ok" I have been looking a lot for cancellations and have been able to get in at Le Cellier, Coral Reef, and Ohana. I even got a Brown Derby fantasmic package last week, so even if you don't get some of what you want on 180 there is still hope of picking some things up later. I never was able to get a CRT for anytime during our trip, but I am done looking and content with what I have. We will have a wonderful trip even without CRT.