I brushed white glue (Elmers) thinned just a little bit with about a quarter teaspoon water, onto the surfaces that were supposed to have snow, then I used a plastic spoon to scoop up the powder, and I tapped against the bowl to strew it on the surface. I also used a straw and a little lung power, to move it around on the glue surface, until all bare spots were covered.
Later, a dentist friend gave me a bunch of old tools, including tools he used to mix plaster, and in that bunch was a small spoon, like the old coffee stirrer spoons McDonald's used to use (till someone claimed that people used them for coke, and McDonald's replaced them with the flat stirrers). The small bowl is good for pinpointing little bare patches. But an old measuring spoon would be good, too.
I've also used a plastic bottle, like a ketchup or mustard bottle, with the pointed tip, to dispense the powder on little spots.
Prost!
Brad