All should be good for you now. Most of the gas stations along I77 have power and fuel now. The storm was a doozy evidently. We just got power yesterday and my buddy still hasn't got his. Ive never seen anything like it. Several motorists were on the side of the interstate I heard after running out of gas last Friday.
Check out the youtube videos if interested. I believe they called this storm type a derecho?

 

And enjoy your trip! We stayed in south Myrtle below the pavillion. PACKED. First and last time I will stay in main Myrtle. Always stayed in North Myrtle and will do so in the future.
Recommend RIOZ to eat BTW. Its beside Broadway but $$$.