I was at the city Saturday night. I was also there last year on the Saturday after Thanksgiving, which, if I remember correctly, was close to being a record-setter. IF you go into the City expecting these crowds, and IF you know where to go and what to do, it's still a great experience. Here are my tips:
1) Get there before rope drop and parking won't be an issue for you.
2) If you aren't a season pass holder, buy your tickets in advance.
3) Visit Midtown before dark OR after the parade.
4) Stay away from the depot while the train is running. Between people getting on and trains letting off, it's the most crowded point in the park.
5) Time your meals during non-peak meal times. For example, eat lunch at 11 or 1, not at noon.
6) Don't go with the expectation of riding a lot of rides. If you want to ride rides, come at a different time of year.
7) If you want to see the saloon show, be in line an hour in advance. (It's worth it, BTW).
8 ) If you absolutely must see IAWL or Christmas Carol, strongly consider the Show Lover's Pass. It's worth the money.
9) Plan to stick around to enjoy the city AFTER the parades. Even on the busiest days, it becomes so serene after the parades. It makes fighting the crowds worth it. Plus, getting out of the parking lots will be so much easier.