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Regardless of the shore excursion you're taking, it's always smart to have a little cash on you for emergencies, tips and shopping. But there's no need to bring a roll of hundreds unless you plan to purchase an entire market stall. Bring some cash (we find $50 or so usually suffices) and a credit card. If you're in a country that requires you to exchange currency, bring a debit card. ATMs offer better exchange rates than banks and currency-conversion centers.
