When you visited in 2012, was that before or after Cars Land opened? If you haven't seen it yet, it's a must do! Radiator Springs Racers is fantastic! That said, DCA has early entry that day for hotel guests, so you may want to start in DL. The best piece of advice anyone will give you is to get there early. DL opens at 8am that day so get there a little before then. Most people head straight to either Fantasyland (Peter Pan) or to the right to Tomorrowland, leaving the whole left side of the park practically deserted for the first few hours.
Other than the 60th celebration and Halloweentime, you probably won't notice much difference in DL. Definitely do the rides that have the Halloween overlays - Space Mountain Ghost Galaxy and Haunted Mansion Holiday. Both have FPs. Other than that, some rides have had some plussing since 2012, namely Peter Pan (the most recent), Matterhorn, Big Thunder Mtn RR, and Alice. You will probably want to hop over to DCA sometime mid to late morning to grab a FP for RSR since they typically run out by 11am on busy days. You will probably get an evening return time, which is good because the ride is even better at night! You can use the new app that figment mentioned above or call Ask Otto to check on what FP return times they are giving out. RSR also has a single rider line - use it if you can't get a FP or want to ride multiple times. If the SRL reaches under the bridge then your wait will be about 30min, but that's a whole lot better than standby which can easily reach 120min on busy days. Other rides that have SRL are:
Matterhorn
Indiana Jones
Splash Mountain
CA Screamin'
Grizzly River Run
Goofy's Sky School
Soarin' (but not recommended-often the SRL is just as long as standby)
I highly recommend using a combination of SRL and FPs, if that works for your group and you don't mind not riding together on some rides.
Hope you have a great visit!