If I had to guess, I would say that you get one wait time, period. The idea is that you are waiting in line, just in a safe place. They do not tell you what you must do while that time is passing, allowing people to handle whatever their disability dictates as best, but you are "in line." And I believe it would be the same in Florida - where it is definitely harder to park hop. This is based on my guesses and the statements of some Disney people in the past, so I cannot promise this is true. I would just think that if they do not allow two wait times in one park, since that would mean being "in line" twice, you would not be able to be "in line" in two parks. I am interested to see how the "wheelchair return cards" worked out today, and in the future - the idea was to eliminate wheelchair queues, like happen at Space Mountain, but I would be surprised if that actually happened. After all, they spaced out people with disabilities quite a bit at RSR and there was always a wheelchair line.