Captains John and Pat, in their message below, are referring to the protected anchorage abeam of the Sea Camp Dock, on the inner, southern portion of Cumberland Island. The other posting they refer to details an anchorage just off the AICW, much farther to the north. Thus, these two postings are actually concerned with two entirely different havens.
However, anchoring off the old Sea Camp – Park Service dock is a GREAT thing to do. Dinghy ashore, and experience an unspoiled maritime forest like few others left this day and time!

Subject: Cumberland Island Anchorage
Cruising News: I was surprised to read the posting about poor holding at Cumberland.  We anchored Summertime just off the Sea Camp Dock over the New Year’s holiday as we have done many times in the past.  Using a 35# CQR and 100 feet of chain in 20 feet, we were indeed secure even with 30 knot gusts on the first.  True, the anchorage is open to the SW, but in any other wind, it is OK.  Don't miss the chance to anchor here and dingy ashore to explore one of the most interesting and beautiful islands in the SE.
John & Pat Rodgers