you may end up waiting a long time for that. I don't know how early busses start x-ferring between the parks. It may be better to park at the TTC and take a bus to AK early, then to MGM, and then jus back to the TTC at night. I'd just be concerned that you were going to be sitting at a bus stop for AK forever in the MGM parking lot waiting for a bus to come, and by then, AK might be nuts.