I know that there was an Archibald Campbell in Colleton County during the period you mentioned. He drew plans for Town of Walterboro (see Colleton County Library), was census taker in early-mid-1800s, possibly postmaster of Walterboro, and I have a plat somewhere that he drew of land in Gloverville (between Cottageville and Jacksonboro). Hope this is the same person or gives you some leads