We are gonna be staying at the wilderness and will have someone who will need a wheelchair in the parks. I have heard people renting them from other companies and having them delivered? Is that a better choice? If we rent in the parks how often do they run out of ECVs in August? what is the best way to do this?And for shows like Nemo and stunts motor cars ; things like that, will she be able to stay in her wheelchair and watch?