cruislovin said:
I called the airline and had it noted on his reservation that a wheelchair was needed. One was waiting for us at curbside check-in when we got to the airport.
That's the way to do it. The airline provides wheelchairs or a cart to get you to the gate.
One note - getting through TSA security in the wheelchair was somewhat of a challenge. Also we found it to be quite time consuming at both airports we used. A seperate line was required for him in the wheelchair. In the wheelchair he could not take anything with him through security, including his crutches and carry-on items.

If she can walk thru the scanner without using crutches, you might be able to avoid some of the wait and the body pat down. They would take the wheelchair thru, search it and then she can sit down again. If she stays in the wheelchair, they do a search with a handheld scanner and a pat down.
keishashadow said:
Not sure how other airlines work but, we notified AT that we'd be bringing our own transport chair (which you can rent, check of the Dis. board - friendly, knowlegeable folks). We were unable to check-in online, they assign those seats @ counter - a bit of a surprise, wish they had told us upfront.
Renting a transport chair at home is a good idea. You can gate check it (ask the gate agent before boarding starts). Also, if you think you will need to preboard, as the gate agent before boarding begins. They often won;t preboard wheelchair users unless you ask.
You usually can't check in online if you have a wheelchair or need assistance and don't alrady have seats assigned, but you
can get seats assigned ahead of time if you talk to a human. There are some seats (specifically the bulkhead seats) that are blocked and can only be unblocked for booking by an agent - either on the phone or at the check in counter. (They also do save some seats for check in at the airport). For most airlines, if you have seats assigned, you can do online check in.
If she gets a cast, you might want to check on whether any rides restrict them so you are prepared.
WDW won't
prevent her from riding anything with a cast. If she ends up with a long leg cast, some of the attractions might be a bit difficult to get on, but no one will prevent it. There are some rides with warnings; you can get information (links to the official WDW Guidebook for Guests with Disabilities on the disABILITIES FAQs thread) and then ask the doctor about them. You will also find info about rides with moving walkways on the FAQs thread.