Hi Jessica! Welcome to the Disney Parks Moms Panel.
I am glad to hEAR it is your first Disney vacation. How exciting!
I have good news. You are welcome to bring your own stroller to Disney Theme Parks. My 05-year-old daughter never got used to those types available for renting at the parks. She needs a little more comfort to be able to relax and even take a nap. I usually prefer taking hers, one of those “umbrella” types, easy to carry and lightweight.
Another alternative is to rent a stroller from an off-site rental company such as Magic Strollers or Orlando Stroller Rentals. You can choose the type you want and they deliver it to your hotel.
If you have the chance, I recommend you visit disneyworld.disney.go.com, and download the
Preschool Parent's Guide to Walt Disney World Resort prior to you visit. You will find a lot of useful information there.
Come back again to visit us soon.
Wishing you a magical day!
Gina V.