Would Putin even let him leave Russia?
But Norway is a Nato country so it's a trap. Don't go there.
With current pressure from Russia even neutral counties like Finland would probably gladly extradite Snowden to US.
[1] https://www.google.co.uk/maps/dir/Moscow,+Russia/Oslo,+Norwa...
[2] https://www.google.co.uk/search?q=weather+olderfjord [3] https://www.google.co.uk/search?q=murmansk+weather+10+day+fo...
Sure, but nothing that can't also happen in a car on a small backcountry road at night. And anyway if he takes a passenger ferry he'll be constantly surrounded by hundreds of other people which is a hell of a lot more collateral damage to take into consideration if you're genuinely concerned about someone causing an 'accident'.