Get you a pair of full length goretex pants. I've run cougar with hounds since the early 80's so I've spent a lifetime hunting in the snow. For years used wool pants and gaiters and was resistant to change.....until I got my first pair of new generation water proof pants, now my woolies hang in the closet unused. They keep you drier, warmer and they don't soak up water like wool.
I currently am using Cabela's Silent Suede pants that I team up with Outdoor Research gaiters. However, if you're concerned about noise, forget about the gaiters and just duct tape your pant legs tight around your ankles. You might not win any fashion contests this way, but you'll still keep the snow out of your boots.