Sorry, but it will be packed because different schools have different Spring Breaks. The crowds start the week before Easter and don't let up until mid-late April. But don't worry, the main ideas for busy season touring are:
-Arrive early early early! Single most important tip. You can get so much done in the first couple hours compared to the rest of the day.
-Use FastPass. There are a few threads on here on how to take full advantage of it (check out Hydroguy's threads)
-Eat at off hours (food lines can be just as long as ride lines)
-If you want to see any entertainment (fireworks, fantasmic, parades) be sure to get "seats" early.