We live on the other end of the state and we usually winterize after Thanksgiving, but we have occasionally used it for the week following Christmas to head to Hunting Island, SC (check it out, it's closer to you). We have gone down there for the Stonewall Jackson/Martin Luther King holiday 4 day weekend; Presidents Day and then for spring break, even an early one.
We just de-winterize once we are there and winterize before we leave there. We don't do this every year, but we have done them all.
We will usually use the bath house for showers, but if it gets below freezing, it's only for a few hours and that's not going to freeze anything solid. We have been known to unhook our water hose from the spigot at night, but that is rare.
Head south and stay on the coast and you are much less likely to get a lasting, hard freeze, no matter what time of year it is. They are not unheard of, but very improbable.