We drove down 95 to 4 today and SC/GA were nightmares, mostly for no reason at all! There was a 2 hour jam, ending just before savannah. What should have taken us 9 hours took 14. Literally, once we drove over the FL line, all the traffic was smoothed out through to Disney.
Anyone coming from 95, be aware!! Exits 1-30 in SC were blockaded by police and national guard on both sides of the highway. There was nothing wrong with the roads or power. People were getting gas but they were not allowing anyone off the highway. There was a notice about the water system but I was not able to get confirmation on this. So, if you are going that way, be sure to stop before you get close to get gas and use the restroom because the traffic jams at each exit (motorist hoping to get off the highway) added at least another hour to the already half speed trip.
Anyone driving down, be sure to have a good traffic tracker. We used google maps, which was fine. Also make sure you know detour routes. Looking at the state of FL on the maps throughout the day, Rte 75 was one big traffic jam. I know it is from evacuees and this will dissipate over the next couple of days but it is helpful to know ahead of time.