Hi, Tammy! I hope you are planning your trip to Disney World, as I have very little information on Disneyland - that is still a dream of mine!
The first thing to do is plan your budget. That will help you determine how many days you can plan on staying. For a group your size (the baby doesn't count towards your room capacity), you can do an All Star Family Suite (which is a Value accommodation), request a trundle bed room at Port Orleans Riverside, check out a home away from home like the cabins at Ft. Wilderness, or splurge on a deluxe room or a villa.
Check out
www.disneyworld.com for a huge amount of information with regard to the various accommodations, dining options, and any discounts or promotions. Depending on when you go, you might be able to find something like free dining available! That would really stretch the unexpected windfall!
When you get to the Walt Disney World website, order a vacation planning DVD. That also is a great help at planning out the time you spend at Walt Disney World.
You might also want to let the girls browse the website and see what are on their must do lists. I like to let my girls plan part of our vacation - I let them choose the theme park and plan our agenda, or they each get to choose a meal that they want to enjoy!
And don't forget - you can come back here as often as you'd like with as many questions as you might have! We'll get you through the business of planning a magical vacation!
Good luck!