Hi Kelsie,
Thanks for sending your question to the Disney Parks Moms Panel. I cannot imagine navigating
Walt Disney World Resort without a stroller when my daughter was younger, it literally was a lifesaver for us.
Walt Disney World Resort has the art of stroller parking down to an art form. By every attraction, there are clearly marked stroller parking areas for guests to leave their strollers while enjoying the attraction. There are Cast Members monitoring the stroller parking areas, so your belongings should be safe. I have always left my belongings in my stroller (except for my purse) and everything has always been there when I came back. With that being said, please remember that Walt Disney World Resort is a public place and things could go missing. Personally, I would say that whatever you would miss if taken, bring it with you. Also, due to the amount of strollers in the area, Cast Members will rearrange strollers in the area when needed. So don't panic if you come back to find your stroller isn't exactly where you left it. I would recommend putting something that is easily identifiable to you on your stroller so that you can find it quickly.
I hope you have a magical visit at Walt Disney World Resort, Kelsie. Please let us know if you have any other questions, we are always happy to help.
Stephanie