I agree about the umbrella strollers. We stayed on WDW property so that we could go back to the hotel to swim and rest with my five year old. We rented a WDW stroller too some days. You can turn it in at one park and get another at the next park if park hopping without paying more. Depending on her weight, you could buy a lightweight travel stroller but the ones that accomodate kids 45-55 lbs tend to cost $85-$200. Good luck!