Yeah, we're gearing up to do 3 weeks in Cordillera Blanca of Peru, but then we'll be zooming over to the NW coast for a couple of weeks of beach action afterwards.
That being said, I have a place to stash gear in Lima at a friends house after the mountains. However, even at the beach, nights can get chilly in Peru, alot more than you'd think, plus the elevation changes in the Cordillera can make for some extremely wide temp ranges.
I'm wanting this to be a solution for here also, and I don't see why it cant be, at least when it's both of us.
I've got my own setup for going solo anyway, so that's not really an issue.
I'm going to work on the down quilt first, after that, if I'm still sane, the synthetic one should be a breeze.