Change in Plans?

We're starting to get to the short strokes on the Alaska cruise. With my m-i-l's health, we're also thinking of contingencies. Besides the obvious, what if she gets a lot worse and my wife doesn't think she should go? Should the HB and I go with my parents? All for one and one for all?

This brings back baaaaaaad memories. When my f-i-l was sick (with pancreatic cancer for 3 years, if you can believe that) we made and canceled all kinds of travel plans (I'm most bitter about our trip to Spain falling through). Why do I get the feeling that we're getting back on that roller coaster?