Hi, I have never been to WDW, but I am a seasoned traveller of DL.
My wife and I went twice in 2012, and that includes during December!
My advice, know what type of park person you are, are you a go do all your favorite rides first no matter the area, or do you like to start and work your way around the park?
DL for us as always been hit the park on the magic morning and you should be able to get most of Tommorowland done, within those early minutes. When we went during President's Day weekend 2012, (My mistake btw, we are Canadian and didn't know it was a holiday) it was the busiest I have ever seen the park.
We were able to do all the rides though and have fun, longest wait was Matterhorn, as it broke down just after we bored the train too.
My advice for DCA is know what you want to do first and go there.
AND since your a WDW pro, I am going to assume Soarin isn't you top choice.
Case and Point, CARS LAND... omg.
They let people in early to stand in the fast pass line for Radiator Springs and they fast pass goes quick, in two hours they were gone. We saw the stand by line and it was 3.5 hours. Plus, the ride kept breaking down.
So if CARS is what you want to see, go early to enjoy it. Also, if you have to choose a time issue between the other two cars ride, they are a little "childish" and if Luigi's tire is greater than 20 mins don't wait, the ride is less than 90 seconds. Come pack during the pixar parade.
For Toy Story Mania, either go early in the morning, avoiding the Carsland rush, and do it or later in the day... FP Screaming and then do Toys.
Most of DCA from then on is hit and miss with timing... I would say do the small stuff, like ride the rail car, see little mermaid (always makes me cry) GET SOAKED on grizzly run, they do provide a free locker so have fun.
Enjoy the cheesiness of the Warf, get your free Ghirdelli chocolate and go on the wine tour-tasting it is fun.
I know DCA gets a bad rap, but it is fun!
If you do have a chance go see the Grand Californian Hotel, you can cut through DCA thru the lobby and into DTD.
It is beautiful, and the Napa Rose although $$$$ is an experience in its own.
If you are a character person, Goofy's Kitchen for Dinner is my favorite, it is easily walk able from the park and worth.
And finally, I am assuming you are 21+ do your self a favor and GO to TRADER SAMS...
It is the most epic-ally awesome bar in the entire complex.
It is located near the pool of the Disneyland Hotel, it is Tiki theme complete with everything, think Tiki Room for adults with awesome food and drinks... I;ll post a photo so you can see, it is fun and not bad in pricing.
If you do anything, do go there, order a special drink and get the tuna chivica with wonton crisps, soooo good.
If you have other questions, PM me or ask and I can help.
Again, I don't know WDW, but I know me my DL.
