First time cruiser embarking in late November.
My wife and I are taking our first cruise, Carnival Victory, in late November. Miami, the keys, Cozumel, and back. We are going on a shoestring budget. What are some unexpected things I should be on the lookout for that will cost extra? What should I partake in that cost is included? What small extras are worth the money? Is it reasonable to assume we can just hang out on a beach and/or snorkel on our own when at port in the keys or Cozumel? (And thus save cost) Thank you everyone. I’m finding this sub to be quite useful.