Have you considered the Boardwalk area? Beach Club is our favorite. Very kid friendly and great pool! You can walk to both Epcot and HS or take a boat. We have stayed at the Poly and I enjoyed it very much. The monorail to MK is GREAT! Not as convenient to Epcot. No one really says that you have to walk to the TTC (which isn't too far, but is if it's raining) or take monorail to TTC from Poly if raining. Then you have to transfer to Epcot monorail which requires walking down a ramp and back up another while packed with people. Then you wait for Epcot monorail and once you arrive there you walk down another long ramp. Just something to think about. I just want you to be aware that it's not direct access to Epcot from the Poly. If you are going to be spending most of your time at MK, I would strongly suggest sticking with the Poly. Honestly, umbrella stroller are easy. It's the huge ones that are packed full of stuff that can be troublesome.
