Firstly, yes, a
scooter (also known as an
ECV) would be a great help for the trip. Don't panic, Disney is the most accessible person I've ever been, and they make it as easy as possible.
You can rent
ECVs from the park, but they can, and often do, run out. If you rent from an offsite company, you can have it for the entirety of the trip. It also normally works out as cheaper, can be used at the resort and DTD and is usually a lot easier to maneuver than the park rentals. If you look in the
disABILITIES FAQ thread, you can find contact details of a number of rental companies in the Orlando area. They will deliver right to your hotel, so no need to worry about collecting it.
If you rent off site, you will need to get them to and from the parks. Pretty much all Disney transport is accessible, and all the buses can carry two wheelchairs or ECVs at a time. The FAQ thread has all the details you'll need on that.
As for rides, almost all of them now are mainstreamed. This means that you can take the ECV through most, or all, of the line, before being directed to a suitable boarding area (often the exit). For the few rides that have alternative entrances, the CM at the entrance to the line will direct you. You can get a Guidebook for Guest with Disabilities for each park, at Guest Relations. It is
also available online, the link for which is on the FAQ thread.
If they want to walk for a while, they can park the ECV in the stroller parking area. It will be perfectly safe, as long as you take the key with you (very similar to a car key), and cover it with a poncho or similar against rain (make sure the controls are well covered, as they can get damaged by rainwater). A number of people here like to use the ECV or wheelchair to get to an area or land, then park it and walk about for a bit, before getting back in to go to the next area. They may find it less stressful to walk through some shops and restaurants, as they can prove tricky to navigate, even for those of us used to being on wheels.
If there at all nervous about driving ECVs, it might help to take them to a big shop, such as Target or
WalMart, that have courtesy ECVs for customers. If they can drive them, they'll be fine in any rental ECV, as the latter are normally much smaller and easier to drive. Before you hit the parks, it would be good if they practiced on their ECVs in and around the resort. If they can go forwards and backwards, and can turn either direction whist going forwards or backwards, they'll be fine. Another thing to practice is to reverse park, as this is necessary on the buses. The drivers are normally very helpful and patient, though, and can provide instructions. If either of them wasn't happy driving the ECV onto the bus, they can load on out of the ECV and someone else in your party can park it.
Hope this helps as a starting place! If you have any more questions, just post them here. Have a great trip!
