Hey Mitch, thanks for your thoughts
Here is a link to the backpack I have:
http://www.adorama.com/LPFP250BK.html?searchinfo=fastpack+250
Definitely larger than a camel-pack hydration shell, but not huge IMO. Also, I will not be stuffing it to capacity; probably just some pocket warmers (to keep the batteries warm?), and my camera, a lens or two, Kleenex, bottle of water ... small things and the like.
Skiing with a backpack I have done before, and I'd imagine it's easier to do that than board with a backpack. Never been boarding with a backpack though (but like I mention, it won't be heavy) but I am afraid it will drastically alter my center of gravity. Did you have any trouble initially?
About taking falls; I don't board too fast anyways. When I have "fallen" in the past I've always landed on my hind side, not my "back." Falling forward obviously poses no threat to the backpack and its goods
I won't have my camera out all the time, but since I am going to Tahoe (don't go all that often) I would like to bring my dSLR, esp. with all the snow that will be there!!!
I don't have a problem taking my gloves off once or twice for some shots on the slopes if the condition permits; i.e. it is not snowing.
What is the lowest temperature a camera can take?