I can echo the suggestion of getting a scooter. I have a similar situation with my mother and she had one last year and it just made it so much easier for her even though we stayed at Boulder Ridge at the time and were close to transport, you never have to worry about being "too far" from anything, at least not in her case. We are actually doing Kidani this year and though I intend to ask for something closer to lobby/transportation still, I'm not as worried if it just means that I and others in party have to walk it and she doesn't. I'm more concerned with being on the proper savannah so the giraffes are visible.