Also - are you still wearing your brown camo? This is an excellent time to really vanish into the scenery by wearing all white!
My 2 cents on white camo.
Be careful with the type that you by.Alot (most) white camo contains UV brightners in the dye used. Although snow also reflects UV rays, it does not move (usually). Deer can pick up movement easily if your camo reflects UV even in snow IMO.