What about something larger that distributes its weight around a larger area? I have a Dakine Helipack (DAKINE : HELI PACK
) with a 2 liter Platypus bladder (Platypus® Big Zip SL™ hydration system
) in it.
The left shoulder strap has a channel to hold the bladder tube & nozzle.
You can also rig the bag to hold your snowboard (vertically) in case you have to hike a ways back to the bus/car/condo