I used to travel a lot for business purposes. My best advice would be to have an offshore account since they have customer service 24/7. It could be easier than you think. In my opinion HSBC has the best customer care and online banking of all... with that being said, HSBC local (Mexico) didnt give me the treatment I was used to (since I usually dress with less than 50 bucks total so I changed to CITIBANAMEX which is nice if you do stay in Mexico.
RE: The Best Bank For US Citizens Living Abroad and How We Deal With Banking in Mexico