I would certainly stop in Charleston, SC for a day or two. You can spend a day visiting Savannah and Jekyll Island, GA. You can easily spend a day in St. Augustine, FL.
In Coastal Georgia, mid-February is historically, at least the last 10 years anyway, the coldest part of the winter. Overnight temps can get down to the low 20s, with daytime highs only in the 40s. It is unusual for temps not to get above 40, but it can happen. Last year we had a warm February, so who knows what this year will bring.
-Michael
Michael Girardo
2017 Jayco Jayflight Bungalow 40BHQS Destination Trailer
2009 Jayco Greyhawk 31FS Class C Motorhome (previously owned)
2006 Rockwood Roo 233 Hybrid Travel Trailer (previously owned)
1995 Jayco Eagle 12KB pop-up (previously owned)