I am headed down in April for my 4th Springbreak at
Disneyland. I have enjoyed them all. Yes; the parks are busy. Yes; the lines get crazy. BUT plan ahead and you will be fine. We always follow these simple tricks;
1) Get to the Park when it opens. We get there as early as possible and hit the rides that tend to be a little slower moving; like PP and Nemo. If you get there early you will enjoy the first few hours with little crowds.
2) Use Fast Pass.
3) Take a break mid-day. Usually by 1:00ish it starts to get really crowded. I remember standing outside Tarzan in just a sea of people. Couldnt walk without touching someone. Headed straight for the gate, came back that night and it was enjoyable again.
4) Take advantage of the Parks being open late. The later it gets; the more the crowds start to thin out.
Also; we tend to skip the shows....If everyone is over watching F! then the lines over in TL or other areas tend to be smaller. This year thou I think we are going to stop to see some of those because that stragey has had us missing out on some good stuff. We also tend to not take any breaks in the morning; the lines are too short to stop and have a snack. We just push through til afternoon and stop then.

I also am planning on using Ridemax one day to make sure we hit all the favs at least once.
YES; I will admit my November trip was allot more relaxing and I would prefer that time. But with two kids in high school; that is not happening. So I try to look on the bright side (longer hours, more shows/characters) and just have a really good plan of attack!