Lots of people trying to find lots of strollers. As always, Disney does a great job, but only so much can be done.
Suggestions I have include:
If driving, put the stroller in the car before fantasmic
Do not leave the stroller somewhere else in the park, as if you are at the late (and normally only) show, you may not be able to get back into the park.
If you do have a stroller, personalize it. You may be the only one with the xxx type of LED lights on it. For us, we get one of the discounted battery operated light strings at Target.