Artos, familiarize yourself with the symptoms of altitude sickness. It can be as little as a light headache and no appetite, or it can be way worse to the point you need to turn around. You won't know until you go. Lots of people are fine at 12k, but it gets worse pretty fast above that. ...or maybe not.
Just read up on it, so you know about it.
Being it is a light snow year, you might be just fine. Go for it!
