We just got back from WDW last week. Crowds were insane - the calendar said 9 but if what we experienced is a 9 I can't even imagine a 10.
Our touring plan was to get to the parks at rope drop - IMHO it's amazing more people don't do this. In every park we were able to complete at least 5 - 6 rides/character greets/shows prior to the crushing crowds that arrived after 11:00. We then ate lunch in the parks and left until the evening.
Magic Kingdom - we hit Buzz Lightyear first, then headed to Fantasyland. We were offsite and were not able to book any FP+ in advance so I had to book there - which I did immediately after my first ride. We picked BTMRR for around 11-12noon, and then Peter Pan and Buzz (again, it's my son's favorite) for the evening after we returned in the evening. Even though crowds were horrible, we never waited for a ride for more than 30 minutes.
Epcot - Road Soarin' immediately, fast passed Nemo (totally unnecessary), Spaceship Earth for 11:30-12:30 (necessary at that time of day to avoid wait) and Test Track for evening. Worked great.
Studios - no FP+ available at all for Toy Story (but still got to ride it twice - once at RD again at end of night. Total wait for both rides 20 minutes) Great Movie Ride for 11:30-12:30 (necessary to avoid waits at high crowd level) Star Tours for evening (good for evening, but not needed in the AM) and Beauty and the Beast (a complete waste) My kids wouldn't do ToT or RnR so otherwise I would have used them there.
Animal Kingdom - Safari - (unused as there was no wait at park open and so many animals were out) Tough to be a bug (10:55 crowds were already bad at this point so it was helpful) Dinosaur - (12:00 for a second ride was very necessary at this time)
Two other bits of advice for what they are worth...
1. Standby times toward the end of the night seemed to be inflated. For example: Toy Story displayed a standby time of 40 minutes at 9:25. No one was standing in the outside queue so we said what the heck let's try it. We got on the ride 15 minutes later. There was virtually no one in the queue.
2. Download the My Disney Experience app before you go and monitor wait times. I admit I'm a bit of an obsessive planner, but I checked wait times periodically the whole week before so I could sort of see when times got long and when times went down.
Have fun on your trip! I'm in the grieving stage of a post-WDW trip

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