Thank you.
The only other option would be considering a 35mm range finder camera there the older ones have very few electronical components if not any at all. Since film has a better tolerance to cold (+/- 40°C approx), you might still find you can get away with some nice photos from your trip.
The only downside, you have to get the film developed then scanned or if you have a negative scanner then a direct copy to your computer. Other issue is going to be you cannot view the photo you have taken so need to be a lot more precise when taking photos which maybe the difficult depending on experience level.The good thing is prices start even on eBay at about £20 which is not too bad.
Easiest thing I would say if it all gets a bit too much is try and find a really cheap and cheerful camera which records to Memory Stick or SD card and even if it fails, you should have some photos to come back home with. Just remember to keep it as warm as possible when not in use so inside pockets until needed. When you get indoors, make sure it is not exposed to severe changes in temperature otherwise you might end up with condensation.
Another final tip, if you do decide to go down the digital route, the camera sensor will get confused if it is sunny and loads of snow around. You might need to lower the exposure slightly to about -0.3, -0.7 or possibly -1.0, The below page might help you make more sense if needs be.
http://www.pixiq.com/article/how-to-exposure-for-snow
Either way, if you do get photos, please feel free to add them since I would love to see.
