OP, you are asking for Pixie Dust.
What many of us have learned is that when you *ask* for Pixie Dust, it often does not materialize. Pixie Dust at WDW is special, because it is unexpected, and is given by a CM to a Guest without being asked. Pixie Dust is never intended to set policy or precedent - it is instead simply a beautiful moment in time when a CM can make a Guest's day a bit nicer, or easier, or happier. That's all.
Just be prepared, when you make your request, that it could be turned down. I'm not trying to be mean, or hateful - I promise! - but the worst thing we could do to you is set the expectation that you will get something that is not ordinarily given simply because you are disabled and asked for it. I think it would be mean to tell you that you should ask for something that (the group as a whole) realizes may not happen. You might feel like your trip was ruined, and you will have spent a great deal of money, and won't be able to enjoy Disney World as you need to. That's not what any of us want for you!
That's why so many people here are trying to set a clear, reasonable expectation for you.
WDW is actually usually pretty transparent and (relatively) consistent when it comes to how they handle disabilities. Anyone who has a mobility related disability, for example, (which for Disney includes difficulty standing or walking, or the need to sit down) is served by using a mobility device. The Guest is left to decide what type of device is best suited to their situation, and is free to obtain that device either by renting from Disney, renting from an outside vendor, or by bringing their own device. The device could be a wheelchair, a
scooter (or as Disney calls them, an
ECV) or for a child, a stroller with a special "stroller as a wheelchair" tag.
The
DAS is meant to serve the needs of (most) other types of disabilities that can't be addressed by a mobility device. Basically, the DAS allows the Guest to wait in a "virtual" line, outside of the standard queue in cases where waiting in line is not do-able, but not related to the inability to stand, or the need to sit. For many people, the DAS provides the best possible experience, because they can still be "in line" for something, but don't have to experience the line which may prove problematic for other reasons. (For example, a DAS may be appropriate for your daughter - and there is lots of information around here about that topic)
Those are the two primary ways that Disney handles disabilities. As far as ADA compliance goes, Disney has lawyers who make sure that they are already compliant with the law in how they handle disabled Guests on a day-to-day basis. Just because we are disabled does not mean that we get to have the accommodations that we *want*. If that were the case, then Disney World would have to be open all night, every night that I visit, because I am allergic to the sun. Instead, I have to plan my hours in the Parks carefully: I go for a few hours in the morning covered in sunscreen and sun-blocking fabrics, and then back to the Resort for lunch, and perhaps a nap, or relaxing by reading, or playing on my iPad. Once the sun reaches a certain point, I can return again to the Parks, and continue my fun with more sunscreen. Disney is not obligated to give me special accommodations because I can't be in the sun. Disney is obligated - by law - to give everyone equal access. How you use that access as a disabled person is up to you.
Remember that you can use First Aid in the Parks (as others have said here) to help extend your time - and the quality of your time - in the Parks.
Consider purchasing your tickets differently, so that they can be used as you need to use them. I agree with others here that have advised dropping the Park Hoppers.
And maybe consider changing your plans for this trip; perhaps concentrate on 2 Parks instead of trying to go to all 4. Focus on what you *can* do - not what you can't do, and enjoy your time with your loved ones. Remember that there are TONS of things to do at WDW that are outside the Parks, and free, or less expensive, and low-stress as well (like riding the Monorail, or visiting other Resorts - and their smashed penny machines! or going to Disney Springs and enjoying some of the street performers there with live music, and riding the water taxis).
I truly hope you all find a way to have the best possible trip.
