Hi, Andrea!
Take advantage of not having to work around school schedules while your princess is still little! Traveling in September is wonderful as crowds are small and you can often get some great
Special Offers such as Free Dining. The weather is still warm so you can enjoy your resort pool during afternoon breaks.
Another great time is early to mid-December. The holiday decorations are glorious, and you can enjoy the festivities and be home before the holiday rush in WDW. The weather is a bit cooler which is nice for the parks but you might not get as much pool time.
Now, when NOT to go: Avoid holidays such as Christmas, New Years, Easter, and Presidents Day. Try to avoid the summer months as this is a busy time and super hot.
Whenever you decide to go, remember that you will need to cater to your princess' schedule! Start your days early, have a stroller, take mid-day breaks, and stay on her bedtime schedule. A rested princess is a HAPPY princess! Good luck planning your magical Walt Disney World vacation!