Bring dollars. When you arrive into the country, you can exhange some dollars ar the airport exchange for pesos in small bills. Because, service operators (taxi's, baggage handlers,restaurants)) there knowing you only have dollars may take advantage of you by playing with the exchange rate if you pay in dollars only. Pay in pesos. Get enough change for your transportation, hunger, and other needs to your final destination. Then, go to a exhange house or bank to exchange you money at a more favorable rate. Regards, PJT