Thanks! We used a variety of transportation methods. Most of the legs were using a personal car (our parents driving us around) but we did use the monorail to get between MK and epcot and back. Our requirement for any "assistance" along the way was that it could only be for comfort and not to provide a real advantage over any other guest. While most guests wouldn't have people available to drive them around, they would have access to taxis. By using a personal car instead of a taxi we actually took MORE time to get between parks because of extra wait and longer walks to get to the vehicle -- all it saved us was a bunch of money on fares, not time.
What did save us some time was that we got picked up and dropped off at the intersection in front of the Contemporary rather than at TTC, but again that's something anyone could do. I do have to say we got really sick of that 1/4 mile path between that light and the MK entrance by the end of the day