Thanks for suggestions, everyone. I had actually thought about the Sheraton having stayed there, but didn't want to add much extra walking for mom.

I think Momento should work fine - one of its fine qualities are the high quality photos posted to the thread (thanks NewbieRunner) which I showed to my mom and she was happy with it since we then could email her friends the photos (and maps) as well.

Fingers crossed (except it's not for almost three weeks!)