Hi Christina! Planning Walt Disney World vacations is so much fun, and since you have a few years to plan, you'll be able to design the best trip ever!
I recommend you start your trip planning by researching the
Disney resort hotels and deciding which one most appeals to you. You can also explore the Disney parks on the website so you'll be familiar with the various attractions each one offers. Browse the multitude of
restaurants at Disney to decide the ones at which you'll want to dine. You'll learn lots of helpful Disney trip-planning tips by reading here at the Moms Panel and on unofficial Disney fan websites like the disboards.com.
Keep an eye on the
Special Offers page of the Disney website so that when you're ready to book your vacation you can take advantage of a great deal. (You can book your Disney resort up to 499 days in advance, but special offers aren't generally released until several months in advance.)
I recommend that you consider visiting just before your oldest son's third birthday. Kids under three visit the parks for free and can also dine for free at the buffets, so you could save a lot of money if you time your trip while both boys are under three.
Come visit us again at the Moms Panel if you have more questions! We'd love to help!