Aloha DW Goofy,
Rapa Nui, the building with the accessible rooms, is not near the lobby. For our circumstances (2 DDs in power chairs), it is not a problem to be a few buildings away from the lobby; we love the location of Rapa Nui because it is the closest building to the TTC (to catch a monorail to MK or Epcot or the ferry boat to MK) and pretty close to the bus stop. Also, there is parking just outside the building, including disabled permit spaces, which is not the case with most of the buildings.
We just got back from the Polynesian a couple of weeks ago. Let me know if you have other questions about access there.