Hello, Samantha!
With your visit coming at the end of April when most schools have already taken their spring breaks, the crowds shouldn't be overwhelming. And did you know that you'll be visiting when the
Epcot International Flower & Garden Festival is happening?
To help with your planning of which parks to visit, you may want to take a look at www.touringplans.com. It is a website that offers advice on which parks to visit and which to avoid on specific dates as well as over 100 itineraries. Basically, all the planning is done for you. The itineraries can be selected to reflect your needs and walk you through the order in which to visit attractions to make the most of day and to cut down on your times in line. I should point out that there is a small fee for this website, but one that I think is a worthwhile investment.
By the way, you'll want to jot down October 28 as the day you can begin making
dining reservations, and you will be able to make up to 10 days worth of reservations at that time. As you begin planning your days at the parks, it is helpful to know your dining plans at that time.
Thank you for the chance to answer another question. Please let us know if you have any more. We all know how overwhelming it can be planning a WDW trip.