Hi Connie,
My family often visits Walt Disney World in the spring. The weather is lovely at this time of year, and it is a beautiful time at Walt Disney World. Given your travel dates, you should be there during the
Epcot International Flower and Garden Festival, which includes amazing topiaries, concerts, and seminars at Epcot. Be sure to check it out!
Crowds in spring fluctuate from year to year, typically depending on when children have spring break and when Easter is. Since Easter is April 20, 2014, and you are coming early than that, you will miss the high Easter crowds. When you visit, I would expect the crowds to be fairly moderate. When I am looking for predictions on crowd levels at Walt Disney World, I like to visit the unofficial website touringplans.com. For a low fee, you can see their predictions for crowd levels at Walt Disney World for up to a year in advance.
I hope that this information is helpful for you, Connie! Have a wonderful time planning your spring trip, and please do not hesitate to ask if you have any further questions. We on the Disney Parks Moms Panel love helping you to plan your magical vacations!