We are thinking of staying at POFQ with my father who is in a wheelchair. He also has back pain that is made worse when being pushed over bumps or driving over bumps in the car. I saw in some of the descriptions that there are cobblestones at the resort. How "bumpy" are they? Are they all over the main walkways of the resort or just in specific areas? Are there certain buildings there that we could stay in that would avoid some or all of cobblestone areas? Thanks!