@Racheltoner hi Rachel. wow cool I hope you have a blast on your cruise.
Insulin should be protected from freezing. A mini fridge might not be sensitive enough to keep something cool and not frozen. I never refrigerate, or frio-pack, or take any special precautions with my insulin when I travel and I’ve been all over the world this year… insulin is fine at room temperature. I protect mine from direct sunlight.
it’s not a bad idea to ensure you can get insulin wherever you are going or ask the ship hospital… many countries insulin is over the counter but the names can be different than what you are used to.
if you pump make sure you are bringing enough supplies. last time I went far off the beaten path (to India) I brought a pump backup plan, which for me was a bottle of lantus and syringes.