Which of the Nik apps has Tonal Contrast, Josh? (edit: Never mind. Found it.)
Yet another is to make a contrasty b&w with lots of texture in the snow and ice, (I use Nik SFX Pro) then overlay it on the colour version using luminosity blending. You can alter density and paint out areas with a layer mask. There are lots of ways to skin a cat. I will try these with interest, though.
Jeremy