If you ever make it to Salta or Cafayate, in Salta Province, let me know. I can hook you up with bitcoins for cash (pesos). You would simply send me an email with your bitcoin address, go to one of 3 people (currently - working on adding more) at their businesses in those places, hand them pesos, they will let me know that they have received the cash, and I will send you your bitcoins. Yes there is an element of trust there, but I run other businesses (http://www.grasshillalpacas.com/alpacaproductsforbitcoinoffer.html and http://www.forstersoilmanagement.com) with integrity and honesty.
I am looking to streamline the process and allow for cash deposits to be made in more cities throughout Argentina. Private message me if you want more details.