I think what this year has taught us about DL crowds is that the average crowd levels dont seem to apply this year.
Christmas break closed its gates many times this year. While Spring Break wont be quite as busy because it is more staggered, I would not be surprised if the weeks immediately surrounding Easter also had this crowd levels. I hate to rain on your parade, but I would be prepared for it to be really, really busy. The advice above about getting there early, using the early entry, and making sure you can get back in if you leave during the afternoon will be really important. Eat at "off" times, do the popular stuff early or really late and do the high volume stuff (shows and fp rides) when it is busier.
That being said, any day at DL is a good day! Just be smarter than the rest of the people there and it will be fine.