My friends and I have an upcoming annual trip to Mt. Lutsen in MN, which is on the north shore of Lake Superior.. needless to say, it gets COLD up there. This is the first year I've had my camera so I am wondering if it will be safe for me to bring my XSi along with me for a few trips down the hills in the extreme temperatures, also I'm wondering if the vibration from riding will be an issue. I have a Lowepro Flipside 300 backpack, and am an experienced rider so falling should not be a problem, especially if I stick to the more mild runs, which I plan to do.