I'd like to thank everybody for their comments. Even the snide ones about Maryland not getting cold were helpful.
My geoclothing was almost exclusively cotton, so I had to obtain some synthetics. I picked up a Columbia activeweight long sleeve t-shirt, a polyesther short sleeved t-shirt, and some Terramax silk(ish) long johns to go under my hiking pants. I'll take the advice and get some wool socks - I like my feet too much to lose them to frostbite.
Seems like the l/s tee, a s/s tee, sweatshirt, 200 wt fleece and a windbreaker/rain coat will be sufficient top layers if I move around and the rain coat should keep me from getting snagged by branches and stickers.
For the pants, I might want to pick up a pair of microfleece to go under the hiking pants in the heart of winter, maybe some of those water resistant shell pants in case I get caught in some precipitation. I'll see how I hold up this winter and make that decision later.
The hat and gloves are covered.
Once again, thanks for the advice.