I am not saying that your DH's PT is bad or wrong. But you know your body best, as your DH knows his. Only he can tell the difference between "sore and tired" and "pain or damage"
You walk between 4 and 9 miles a day at disney, and "man up" will only get you through so much!
He can drive to a ride or section of a park, and then walk through stores and restaurants. He can park outside shows and use a regular seat in a show. He wont be "taking anything" from people who cannot transfer from their chair, and he will not be in pain in hte happiest place on earth!
That's exactly my point, particularly in Epcot. It is huge. Even if we only do two parks (Epcot and MK) I think it would be worth it.