Hi Erika!
Welcome to the Disney Parks Moms Panel! You're going to have so much fun watching the magic of Disney come to life through the eyes of your
little Mouseketeers as they experience everything that is Walt Disney World Resort. You get super smart parenting points for mapping out restrooms ahead of your visit. (Pro Tip: Some in-park restrooms are so themed and decorated that they're social-media selfie famous. Check out the "Tangled Toilets" near "it's a small world" in Magic Kingdom Park, as well as the playtime inspired potty area of Toy Story Land at Disney's Hollywood Studios.)
Yes! Each Disney Theme Park has a set of pre-entrance
restrooms that can be accessed before the park is officially open. In Magic Kingdom Park these are located all the way to the right of the entrance turnstiles. Epcot has two sets of pre-park restrooms: one is located all the way to the left of the entrance turnstiles and the other is closer to the bus drop off area. For restrooms at Disney's Hollywood Studios, head to the left of the turnstiles. And go all the way to the right of the turnstiles for pre-entry restrooms at Disney's Animal Kingdom.
Bonus tip for planning a pre-park morning with kids: both Epcot and Disney's Animal Kingdom have a coffee and pastry stand. And all four parks have some kind of gift stand/shop that will sell the things you may have forgotten, like ponchos or bottles of water, as well as the things you didn't know you needed. Don't forget that you can
send non-food purchases back to your Disney Resort Hotel so you don't have to carry them around all day!
I hope this helped, Erika, and We'll See You Real Soon!
~Kristen