S.C. Code Ann. § 25-1-2130
Any member of the National Guard parading or performing any duty according to the law shall have the right of way in any street or highway through which he may pass and while on field duty shall have the right to enter upon, cross or occupy any lands when no damage will be caused thereby. Any person belonging to the military forces of the State going to or returning from any parade, encampment, drill or meeting which he may be required by law to attend, shall not be subject to fees on roads and bridges in this State.