Just remember that when there is any chance of ice or snow, its a law that you go to the store and buy up all the bread and milk you can. Nobody knows why, you just do it!
Seriously though, the ice storms in the Upstate suck, but they are the only serious natural disaster we have. You might bet one or two a year, so jst make sure you have some flashlights and a heater "just in case."
SCDOT used a sand/salt mix from what I hear (for bad storms). But usually they use a brine solution, which basicly lowers the freezing point of water on the roads, thus preventing black ice.