Traveled from SC to PA too many times that time of year to count and the one thing that is constant is the dramatic change in temps, especially riding at night. If you don't have heated gear then long johns, layered socks, good insulated overpants, 3 season bike specific jacket and some kind of neck and head cover. One of those turtle fur balaclavas work great. Cold weather rated Touring gloves and riding boots too. You'll be looking at this pile of fluff while packing wearing shorts in Tampa wondering if it's worth it for all of the space it takes up, but believe me if you didn't you'd pay twice the price for it once you start getting cold. (3x once the wife gets cold!)
Heaven is a sweeping mountain road in the mirrors.