15'sAway, You should know by now, that I would have both Winter and Summer/Fall versions of the same regiments.
Winter for Trenton, Summer/Fall for Saratoga and others.
Stryder I use combinations of Woodlands Scenics Soft Flake Snow, WS Realistic Water and super glue to make Ice, Slush and plain old Snow. Mixing the Soft Flake into Super Glue or Realistic Water gives you various results as far as making ice or slush. Play around with mixtures until you get what you want.
Here's a few examples. The last photo of the Philly Light Horse show that you can also make mud and frozen ground using these products.