Yes thur hotel or park
Yes I believe there is. Do visit their website or call customer service for assistance.
Last I knew... no. They are first come first serve. Having said that, I only recall once where they were all rented out.
Nope. First come first serve
They have some at the parks, but there are also outside companies that deliver to the resorts. Scooters can go on Disney transportation (buses, boats, monorail...).
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