I'm planning a fall foliage tour of the Kangamangus highway for photography. It'll be in Early October sometime at the peak of the foliage season for that area.
Snow around here arrives in bulk around late December to Early January. We some times will get in as early as November but it's usually just a dusting to an inch and it's gone soon after.
More so for Foliage, it's a fleeting time period lasting a week or two per area you plan to visit. Snow usually a more flexible thing, once January arrives it's a safe bet until March.