First of all I had a lot of trouble deciding if I should risk actually doing this, but I just didn't want to miss out on the fun of being able to shoot pictures on the mountain. In the weeks before my trip, i decided that if i will take my gear snowboarding!, it needs some preparation.
My gear was a Canon 450d (rebel xsi) + Battery Grip + Sigma 70-200 2.8 Hsm
I had other stuff with me on the trip, but i decided that was all I needed for the actual snowboarding.
I went snowboarding along with alot of friends ( it was a trip by a youth organization) and we went sking for 4 days, but I shot only one day. I am a fairly good snowboarder and I don't drive slowly or cautiously...
On the first picture, you can see the gear i had. I used a normal Nike backback ( closed with a zipper) my camera+ battery grip + 70-200.
I customized the whole setup though, to make it weateher proof. I didn't want to take any risks.
Around my camera I put a silicon case, which i got off of amazon for 10 euro. i cut it, so that I could use it together with the battery grip. Then, and this worked really well, I cut up an old black sock, which I used to create my own weather sealings. I put one where the lens mount is, so that water, snow or dirt could really not enter the camera body. Then, inbetween the Zoom and the focus I placed another, leaving out a speace for the little focus distance display. This should basically act as a "sweatband", for when the camera is back in the bag and the snow begins to melt, so that it doesnt, go into the cracks.
Then around the lens i put a big lens pouch, which I bought for 12 euro, when I bought the lens. ( always good to have)
And around the lens, when in the bag I put a small towel, just to suck up the moisture.
Also with me: An air blower and a cleansing cloth.
I had no trouble at all with freezing batteries or the batteries losing charge..
The temperature change, for example when I went to eat something obviously made the lens unusable for 2-3 minutes, but after a couple of whipes with the cleansing cloth the problem was solved.
Me and my friends had a lot of fun that day, and i would do it again everytime i could.
Due to the missing ramps and rails, it turned out, that I shot more portraits than action shots. However this was my first attempt at Photography under these circumstances and to find the right settings really wasn't very easy. A couple of shots were taken at 1/4000 Iso 100!!!
* I shot the first pictures and got really depressed, because every White Balance I tried turned out to look really bad, when I noticed I still had my colored skiing glasses on

!
Creative Criticism is very well apreciated.
Hope I was able to provide some Tips for people planing to take their gear up the mountain or just in difficult weather situations.
Here are the pics:
http://flickr.com/gp/46460129@N07/gjq57Q
http://flickr.com/gp/46460129@N07/8034y8
http://flickr.com/gp/46460129@N07/cji99g
http://flickr.com/gp/46460129@N07/7Ws9Yq
http://flickr.com/gp/46460129@N07/8xWWxU
http://flickr.com/gp/46460129@N07/8Hdg91
http://flickr.com/gp/46460129@N07/8Hdg91
There are more on my flickr account:
http://www.flickr.com/photos/46460129@N07
[url][/url]
_________________
FLICKR:
http://tinyurl.com/388cldd
Rebel Xsi + Grip, Tamron 17-55mm 2.8, Sigma 70-200 2.8 (non II), Canon 18-55mm IS, 50mm I.8 II, Sigma 30mm 1.4, Cullmann 4500-c Flash, Canon Speedlite 430 exII, Nikon Speedlight SB-80dx , Lensbaby composer, Studio Strobe and Equipment