score:1
as DumbCoder said Taveller's Cheques are a good option, you are insured against theft.
regarding credit card expenses they can go grom 2 to 7 percent and as said on Independent Tavaler and WikiHow one of the best way to be overwhelmed by exchange rate would be to use your credit/debit card since you won't be charged with ATM fees.
Personally when I went to Australia and Asia, I had a Visa Premier card and my bank made me pay a 3 euros fee in order to exempt me from having any ATM fee.
Also get some local currency cash with you in case you have a problem finding an ATM or any emergency.