Nitpicking.
Wouldn't plan A be racing back to your resort while plan B (if you got a "yes" to your inquiry) would be relaxing a bit after lunch, taking pictures, buying gifts, etc. at the other resort?
I think that the Magical Express drawing board had the provision for letting guests select what resort they wanted to arrive at and depart from. But that one of the pitfalls was last minute minute disputes, he said she said, about being reserved on a bus from the wrong resort back to the airport. Requiring guests to return to the airport from their own resort cut down on the number of permutations and therefore cut down on possible confusion.
However, seeing that you need to reconfirm your DME back to the airport by the morning of the day before the day you will take it, that should avoid both of the problems immediately above.