This would be epic- only thing is, it has to be something that's obvious from the shoulders up. I'd go with hipster- roadie bike hat, scarf, wife beater, fake eye glasses, earrings, ...
If it were a full shot, just wear what you would on the hill- lots of tall tees, pants around your knees, beanie, bandana, ski boots, and headphones.
(that's speaking for the average NSer, not myself)