Ahh, a question I can answer! I used to work for the skyride and I can try to help. When I worked there, if the stroller didn't fit, they would send the stroller on the next gondola. There are also special gondolas that have seats that can fold up, but those are for wheelchairs.
Just to let you know We take strollers on our trip to Williamsburg and use them for the historic triangle visits, but we always rent a stroller at Busch Gardens. It is $15 but you dont have to lug it around when she walks or when you take the train or skyride as there are extra distributed at each skyride or train station. They give you a nametag when you rent it and you can just remove the tag and insert it in another when you get to a new area. After a day of fighting a stroller in 90+ heat $15 is well worth it in my opinion. My daughter will turn 5 this monday and she will celebrate it in the park. Have a fun time
Thankyou all so much for answering so quickly! Even though my daughter is 5, we all still like the stroller. That's alot of walking for little legs. She can't wait to go, it will be her first trip!