Linda Smoak, a retired nurse who chairs a Republican women's club group in coastal Sea Island, signed on with Mr. Gingrich a few weeks ago after her favorite, Herman Cain, suspended his campaign.

WSJ: Romney's Rivals on Right Look to South Carolina

He was also able to attend the group's overnight camp while a nurse's aide stayed with his mom.

CNN: Help for a 'hidden population' of caregiving kids

The nurse said the charity's mission had been recognised at government level and the group had been invited to put forward recommendations.

BBC: Claire Stephens