Most of the time, I ski with several hundred or thousand fellow skiers. Fewer in the backcountry. But I promised the missus that I wouldn't ski the backcountry alone anymore after breaking (fortunately only) a rib, alone, a 5 mile, 5000 vertical foot hike from the car last spring. I was suitably chastened because we had to skip a planned backpacking trip because of it. I now concede that it's not wise.