I sail on the Italy, the Adriatic, and Greece cruise on the Viking Sky in June. Although my walking is slow aided by a cane, it's generally pretty good. But standing for long periods of time is tiring. I am considering taking a smallish folding rollator not for walking but to sit on when I tire. It would only be used on the shore excursions and my daughter would be the operator. Has anyone had experiences that they could share? Will the rollator be allowed on the tour busses? Your help and advice is much appreciated.