Question: Which island is off the coast of Georgia and is part of Camden County?

Context paragraphs:
Joseph W. Cowgill: Joseph William Cowgill (April 24, 1908 – November 19, 1986) was an American Democratic Party politician who served as the Minority Leader of the New Jersey State Senate.  He is a 1929 graduate of the University of Pennsylvania and a 1933 graduate of the University of Pennsylvania Law School.  He was elected to the New Jersey General Assembly representing Camden County in 1940.  He did not seek re-election to a second term in 1941, but instead ran for Camden County Surrogate (Probate Court Judge).  He resigned as Surrogate in 1943 to join the U.S. Navy during World War II.  Cowgill was an Assistant Camden County Prosecutor in 1945, and served as the Camden County Counsel from 1947 to 1953, and again from 1957 to 1960.  He was a Delegate to the 1947 New Jersey Constitutional Convention, and an Alternate Delegate to the 1956 Democratic National Convention.  He was elected to the Camden County Board of Chosen Freeholders in 1952; he did not seek re-election in 1955, but instead ran for an open State Senate seat when Bruce A. Wallace retired.  In a close race, Cowgill defeated Republican Haddon Township Mayor William G. Rohrer by 290 votes, 54,683 (50.02%) to 54,393 (49.76%).  Cowgill again faced Rohrer when he sought re-election in 1959; this time, Cowgill won by 4,092 votes, 61,656 (51.72%) to 57,564 (48.28%).  He served as the Senate Minority Leader from 1959 to 1964.  In 1963, Cowgill was defeated for re-election to a third term as State Senator, losing to Republican Frederick Scholz by 13,627 votes, 72,873 (54.94%) to 59,246 (44.66%).

Indian King Tavern: The Indian King Tavern (also known as the Creighton House, or Creighton Tavern) was a colonial American tavern in Haddonfield, Camden County, New Jersey, United States, which was the site of a 1777 meeting of the New Jersey General Assembly that officially ratified the Declaration of Independence and adopted its Great Seal.  It was the first State Historic Site, adopted as such in 1903.  Its original structure remains largely intact.  It is listed on the National Register of Historic Places.  (Haddonfield and surrounding areas have been part of Camden County, New Jersey, since the formation of Camden County on March 13, 1844.)

Cumberland Island: Cumberland Island is one of the Sea Islands of the southeastern United States and is the largest in terms of continuously exposed land.  It is located on the Atlantic Ocean off the coast of the U.S. state of Georgia and is part of Camden County, Georgia (30°51′N, 81°27′W).  Cumberland Island constitutes the westernmost point of shoreline on the Atlantic Ocean in the United States.  The island is 17.5 mi long, with an area of 36,415 acres (147.37 km or 56.25 square miles), including 16,850 acre of marsh, mudflats, and tidal creeks.  There is no bridge to the island; most visitors reach the island by the Cumberland Ferry from St. Marys.

Camden, New Jersey: Camden is a city in Camden County, New Jersey.  Camden is located directly across the Delaware River from Philadelphia, Pennsylvania.  At the 2010 United States Census, the city had a population of 77,344.  Camden is the 12th most populous municipality in New Jersey.  The city was incorporated on February 13, 1828.  Camden has been the county seat of Camden County since the county was formed on March 13, 1844.  The city derives its name from Charles Pratt, 1st Earl Camden.  Camden is made up of over twenty different neighborhoods.

Camden County Technical Schools Pennsauken Campus: Camden County Technical Schools Pennsauken Campus, also known as Pennsauken Tech, is a four-year regional vocational-technical public high school located in Pennsauken Township, in Camden County, New Jersey, United States, that serves students in ninth through twelfth grades from across Camden County as part of the Camden County Technical Schools.

Camden County College: Camden County College (CCC) is an accredited co-educational two-year public community college located in Camden County, New Jersey.  Camden County College has four distinct campuses located in Blackwood, Camden, Sicklerville, and Cherry Hill.  The main campus is located in Blackwood.

New Jersey Route 143: Route 143 is a 2.43 mi long state highway in New Jersey, United States.  It is a short route in Winslow Township, Camden County, running along Spring Garden Road between Cedarbrook Road and White Horse Pike (U.S. Route 30).  The route's southern terminus is at an intersection with County Route 561 and Camden County Route 726 in Winslow Township.  The route heads along the old alignment of New Jersey Route 43, intersecting with U.S. Route 30 and ending a short distance afterward, where it continues as Camden County Route 716.

High Point-Half Moon Bluff Historic District: The High Point-Half Moon Bluff Historic District, on Cumberland Island near St. Marys, Georgia is a historic district which was listed on the National Register of Historic Places in 1978.

Camden County Police Department: The Camden County Police Department (CCPD) is a county police agency in Camden County, New Jersey, formed in 2013, and the primary law enforcement agency for the city of Camden, New Jersey.  It is the successor to the City of Camden Police Department.  It is sometimes referred to as the Metro Division even though, unlike many other metropolitan police forces in the United States, it presently does not patrol outside of the city.  The department is available to all municipalities in Camden County on a voluntary basis, although no municipalities other than the City of Camden have announced plans to join the county police district.

Lower Camden County Regional High School: Lower Camden County Regional High School was founded in 1939 in Lindenwold, New Jersey, United States.  As the school district grew, in 1958 Edgewood Regional High School was built and Lower Camden County Regional was renamed Overbrook Regional High School as part of Lower Camden County Regional School District #1.

Supporting paragraphs: High Point-Half Moon Bluff Historic District Cumberland Island
Answer: Cumberland Island