Hey howdy hey Charles and welcome to planDisney!
Charles you and share some similar concerns. As our family grew to a family of five, our travel plans became much more complicated in booking hotels, dining and travel in general with the larger family so sit tight I've got you covered on this one. Long story short with your specific number of travelers is it depends. It depends mostly on the age of the other two children. In Walt Disney World Resort, the age of 10 is the transition from child to adult and is counted as such in both rooms and ticket prices. As long as all four of the children are under the age of 10 here are your options.
On the other side of the age discussion, children under age two are infants and do not need things like park passes or big considerations for rooms. However, looks like with the number of people potentially traveling, six maybe, you might have an issue booking certain rooms from a space perspective. If you want to stay value resort, the family suites over at
Disney's Art of Animation Resort or
Disney's All-Star Music Resort would work. You also have the option of looking at
Moderate Resorts. These not only have more space in general, but several of them, such as
Disney's Port Orleans Resort-Riverside, have a fifth sleeper and that would work out well for your travel party and are not as expensive as the family suites. I would have to say that Disney's Port Orleans-Riverside is my ultimate favorite from the Moderate Category of hotels from all considerations of rooms, amenities of the resort hotel to decor, it is a really nice resort.
Sounds like you already have things considered with the younger two with regards to sleeping arrangements. If you need to, you can
request a Pack 'n Play for the room with initial room requests, when you check-in online or when you arrive at your resort. These are complimentary to Guests, just make sure you get your request in early.
I hope this helps to clear things up when traveling to Walt Disney World Resort soon with your new travel party. I absolutely loved seeing how my daughters interacted with the characters, enjoyed the parks, the pools and everything about the resort when they were small. I hope you get the same experience and enjoyment. If there is anything else we can help with on planning your next trip let us know, we love talking all things Walt Disney World Resort here at planDisney!
Happy Planning,
Nick