Later in the morning should not be a problem with the buses, if you're asking about how crowded they are. It's an interesting decision between AKL and Poly. If you can use more room, the 1BR at Kidani is way more comfortable than the studio at Poly! But if you're planning much time at MK (or even EPCOT, with the monorail access), Poly is a nice place to stay. If you're spreading time around the parks, the more peaceful stay at Kidani is also very, very nice. Good luck with your decision - you don't have a bad choice!