I have rsd that affects my legs where i cannot walk far, stand for long or sit for long. My favorite vacation is a cruise because they offer so many things to do on board and shore excursions for folks with various degrees of abilities or disabilities. If you,re unsure about an event the cruise staff members can advise you. As for the movement of the ship-the way it sways back n forth and the sound of the waves, i found myself sleeping late and napping in the afternoon. I did get seasick ie severe nausea one day on the return voyage cause of choppy waters. This happened on both cruises. The cruise staff have pills available for this. So i lost one day on each cruise. Not bad. I also left out of NY but went south. Many vacations involve so many physical things i cant do, cruising offers alot in one spot that there was always something i could do.