Filming a backcountry snowboard flick? Use the camera bag designed by riders, for riders: Burton Zoom Pack [28L]
It features a vertical snowboard strap and an external shovel compartment. The backpack is intuitive, well designed, and evenly distributes the weight.
However, this pack is amazing off the mountains as well. It fits a 13 inch Macbook in the laptop compartment sleeve. It is also loaded with pockets and useful compartments for your SD cards, film and batteries.