I've seen the effects of driving snow at altitude on various bits of avalanche research kit (kit which effectively uses pipes like a safari snorkel facing the cardinal points to capture snow) where in certain conditions of temp and wet snow and wind the snow build-up fills the neck of the pipe intake and chokes the hole. I wonder whether the same thing is likely to happen in cold/wet/sticky snow conditions on your Land Rover? Anyone had this happen? Just curious.