Southern moms help!

I am thinking about traveling south in March for a small vacation.  I will be 17 weeks with twins and my doctor is ok with me going as long as I do my research and am within 30 miles of a major hospital with great prenatal care in case of emergencies...  We are thinking the Charleston, Beaufort, or Savannah areas.  If you know of a great hospital in those areas please let me know!! Thanks!