My personal experience is that substantial recreational crabbing is a thing of the past. Commercial pots are now everywhere along the coast in most all of the creeks. I long ago gave up trying to catch enough for a decent meal with a crab line and chicken necks.
In early '70s, I remember catching well over a bushel with lines and chicken necks from my boat in about two hours on an outgoing tide in Chechessee Creek. Not so now, including places like Big Bay Creek behind Edisto Beach and the Stono and Folly River area near Charleston. Regulation of crab permits by the S.C. Department of Natural Resources is a joke.