CHARLESTON, S.C. (WCSC) – Gas prices in South Carolina are pretty steady heading into a week notorious for holiday travel, with only a slight uptick in cost. In the state, average prices are up but 0.8 cents per gallon in the past week, leaving motorists in the Lowcountry with an average gas price of $2.72 per gallon, according to GasBuddy’s survey of over 3,000 stations in South Carolina.