I brought $700 in cash, plus $1000 in travelers checks.
Flying cross country, I had to allow money for 2 meals each way for 4 people.......plus breakfast the morning of the cruise......and airport and hotel meals aren't cheap.........that was $150 of my cash gone. Tips on board I did in cash, about $250............parking at the airport at home was $100 for 8 days..........blew another $100 in cash in St. Martin and St Thomas, so came home with $100 in cash, and never touched the travelers checks.
Only thing we used the credit card for was excusions and beveraged on board, and that ran $1100.