This is our experience:
My Mom had a stroke 3 years ago and can not use her right side. She uses a wheelchair and scooter. Last year she had a handicap cabin Category 8 which worked well because she could roll into the room with plenty of space and it has the safety railings in the bathroom and a roll in shower. I do know we had medical forms completed for her and my Dad was in contact with the
DCL Medical Coordinator who was much more helpful than our own TA!
DCL requires their medical form be completed by a Doctor and faxed back to them not your TA. Also keep a copy with your documents. I am not sure if you booked through a TA or DCL but either can provide you the required form. They will also give you the DCL Medical Coordinator's name, fax and phone number. Make sure to follow up with her to ensure she received your documentation.
The DCL medical coordinator told my Dad that if you are assigned to a handicap cabin and do not have a medical form on file or if DCL is not aware of your need and has the required documentation for another passenger they can and will bump you from that handicap cabin to make room for the documented disabled passenger.
I believe DCL does a good job of verifying who really requires these cabins so the disabled can enjoy a cruise vacation. It is hard to believe but some people will try for a handicap cabin because they are larger than a normal cabin for that category. Of course it is hard to know or determine with the eye a disability therefore DCL has their form so people don't slip through the cracks. I think we all have seen those folks who use scooter because of weight issues and such at WDW to get to the head of the line. It can be the same on the ship. But as I said the naked eye can not determine many times someones special needs.
Both times we have cruised on DCL and for our next DCL cruise DCL and the TA requires we have Disney's medical forms completed not just a Doctor's note to be safe.
The only issues we found with DCL and cruising with a disabled person is DCL only has cabins in certain catergories. Now we know that is because of the way the ship is built and some areas of the ship allow for a cabin to configured larger.
But it is as if they are penalizing a disabled person who wants an oceanview. The price jump from a Category 8 to a Category 9 can be several hundred dollars and they are the same cabin except on different decks.
There are only a few handicap cabins on each ship and only in certain categories. For example if you require a handicap cabin but want a oceanview (porthole) you must pay for a Category 8 instead of a Cat 9 which will cost you a couple hundred more.
It is a shame the disabled person has to pay more to have a porthole or the only other option is an inside cabin or paying the $$$ for Category 8, 5 and 6.
The other issue we had is it is amazing how many people will not move out of the way, cut off you off when waiting for an elevator and really have no respect for someone disabled and unable to walk. I have noticed that if the parents do it the child do as well.
We were on a full sailing on the Magic last fall and I am not sure if it was bad luck, a full sailing or what but my Mom was being run over by people. Others you can say excuse me 100 times and they still won't move. I am not sure what makes them this way but I can assure they do not have a disabled loved one or they would not act this way.
Be prepared for it but as I said maybe it was just bad luck with the group of people we were sailing with.
To answer your question, go ahead and make contact with DCL to get the required medical form and then speak with the Medical Coordinator. They may be understanding and let them know that it is not acceptable to have the huge jump in price to go from an inside cabin to a porthole and they may just assist you.
Also, it is essential if your daughter should need to see the doctor on board they will have her medical information.
Have fun and enjoy!