Cindy, so glad you are feeling better! I've not been on a cruise, but I do manage one vacation a year with my daughter and her family. We always camp out, and I am able to manage by resting when I need to and begging off activities if I feel too tired.
I had had an upsurge in energy myself for the last several weeks, since I discovered I'm gluten sensitive and went gluten free in my eating. I managed to get rid of some of the excessive fatigue I was experiencing, and am more or less back to my normal MG fatigue. Nice to be normally fatigued, believe it or not!
Hugs,