I've never had to rent a wheelchair at the parks, but this year we're heading down with my parents who are close to 80 y\o and will have a hard time with all the walking. Is there one place online I can go to find out all the needed information - such as: how to rent, what rides\attractions they can stay in their chairs or is it better to park and stand in line, ...
I also read something about being able to use a wheelchair at no charge while at our resort. Does anyone know anything about this?

Thanks for any help you can give me!