X should definitely be open by then unless something goes drastically wrong this month. I just went to MM, check out my trip report here:
http://www.coasterforum.com/boards/s...threadid=14357
Here are a few tips that might help you:
1) Get there when it opens at 10:00 AM. You can walk onto some of the best rides in the world if you get there on time. And the mad scramble around the mountain to get to your ride of preference is not to be missed.
2) Do Deja Vu early. I did it at lunch hour and didn't have too bad of a wait, but it could have been much, much worse. The ride takes forever to load and unload, hence the resurrection of the nickname "Delayja Vu." The ride is not to be missed though. Simply awesome, be sure to ride it!
3) Don't forget about the Orient Express. It's a little train that has one station next to Revolution and the other at the top of the mountain on Samurai Summit. The Orient Express can save you a lot of time and energy (walking the mountain multiple times can tire you out!). And if you take the OE to the top first thing in the morning, you can ride S:TE as a walk-on (provided the weather is right, see my TR).
4) Ride Riddler's Revenge in the front row. It really enhances the experience. It's a great ride, but to enjoy it in all its splendor, wait the extra minutes and ride the front. It is a truly incredible roller coaster.
Have a great trip!