Somehow I always found a place where I could practice. Even on the ship I did once the first series (except sirsasana). On trips I have to be flexible, I know this and I was flexible. Sometimes I had only time for pranayama and meditation. Sometimes I could do the complete first series because there was time and room.
Funny was that when I meditated again in a hotel (after the cruise), the floor below me was not stable. It was as if I still was on the ship.
I had wonderful practices and awful ones. It was very mixed. As usual.