Normally you would do better to get your Euros over there. But it might be a good idea to get a few Hundered before you go. You can get them from places like AAA, if you have a amex you can get them thru amex and many local banks can get them for you also. You could check several places because the conversion/buy rate could vary quite a bit.

Once there then you could use ATM, local bank, etc to do the exchange.