Simon and Cindy....bring Canadian money to change over to Jamaican. It's about an 80:1 exchange right now for easy computing. All your food, drinks and route taxi fares can be paid in Jamaican. Only spend your US for airport transfer, day trips and souvenirs. If using the ATM, watch out for fees that your bank may charge on top of the exchange rate! We usually just change our Canadian cash at the cambio.