That part I couldn't tell you, I've never been over seas. I'd imagine it'd be best to have a little bit of foreign on you for cab fair from the air port if needed and such. There could be a possibility that there's a place right in the airport for you to change out some of your money but I'm not sure.
Also, something to think about is Visa/Mastercard is accepted globally and your bank may be able to do the math for you and change the currency when you use your card over seas.
You might want to call your bank to find out, not only that it would be a good idea to tell them your leaving the country and might be using your card. Most banks might flag it as stolen if all of a sudden you use your card in a place where you don't normally do transactions.