Love Snowboarding, my favourite thing ever!
I carry my equipment, usually a Body, Wide Angle, Regular Zoom (24-70mm f2.8) and a Telephoto (70-200mm f2.8 IS) for when I want to spend a day shooting pics in a Dakine Photography backpack for boarding/skiing, easy access and it protects your equipment and more importantly your back if you have a spill!
When I'm not shooting stills, I'm carrying my HV20 Canon Camcorder - got some amazing footage going down the slopes and stuff! You get used to it, I'm quite happy carving and jumping while holding my camcorder now...
Give it a try, the results are great