Hi ,
that reallly depends of the scale of your scene. In close ups a snow-terrain works really good. That means, like ocean, you build a terrain, very soft and that is the snow in your scene.
On large scales, the snow distribution on terrains works really good.
On objects, you also can use the terraindistribution to lay snow on trees, cars or houses.
I mean the terraindistribution of C4.
But it would be better, if you give us more details of the scene, you have in your mind.
Johannes