Our last trip we did a 2 day out to Cerro Electrico.  We stayed under this climbing bicouac at the top of a monster hill we had to climb.  Wonderful campsite.  It snowed the day before we climbed up here, and we ended up not making it all the way up to the top of cerro electrico since there were massive snow drifts and it was very tretcherous to find footing (or a trail for that matter)