Book the Refugio ahead too as it was quite crowded when we were there though mostly that was bad timing as a group of school children were there at the same time. Getting there from Cordoba airport with a rental car is not hard even though it had rained the night before and the last "bit" was dirt road and muddy.

One thing I cannot emphasize enough is to bring GPS on your cell phone and back up battery pack. I am an experienced hiker and my friends made fun of me. The trail is hard to follow at times and on our first night a mist enfolded us so quickly just before we got to the refugio you could not see 5 feet in from of you!! We even got off track and were able to get back on thanks to my GPS!

Other than that it was a great hike. We did it in 3 days and two nights but if you get up early the second day you can feasibly make it in two days one night. It's a long second day though and you had better be in good shape! Enjoy!