Thanks for all of the replies so far. I am actually thinking of keeping the trip but changing it to a WDW trip and shortening it by a couple of days. I would use the money I had already put toward the cruise toward the resort reservation--and hopefully cruise again in the future. DH has had two days of dialysis now, and says he doesn't feel any differently, but again, he didn't feel sick anyhow. At least on land if something went wrong, we could go to a davita center nearby (the center we are using now is a davita as well).