Uhh, you can only freestyle ski for so long too.. after a while your body gets too fucked to shred. Your knees/joints in general turn to a garbled peice of shit and you don't have the same quick recovery time that you had in your youth. If you really enjoy high school sports... I would say go for it, but if you like skiing more, I dont see why you shouldn't ski all winter, it's your life, and hs sports don't really matter much lol, unless you'd like to go professional in something like football/basketball, which probably isn't going to happen anyway.
seriously, the only good thing about winter is skiing. And i'm not off the wall crazy about snowmobiling anyway. without skiing the winter would suck balls and i would move to CA.