Few have ever ventured

having a look at my National Geographic map of the Channel Islands

source

says the NPS:

The freighter Chickasaw, with its cargo of children’s toys, ran aground on the south side of the island in a heavy storm in 1962. Since the time of this photo, the Chickasaw has further deteriorated leaving very little wreckage visible to visitors.

and from this one, CA Wreck Divers:

The wreck of the Chickasaw remained one of Southern California’s most prominent wrecks as her large hulk stood fast for many years.   However, the exposed site gradually wore down her hull and those that visited her periodically saw her swallowed up the ocean, piece by piece, as her hull disintegrated into the surf line.  Today, nothing remains visible of the ship, except for her smoke stack that lies on the shore.

Given the unprotected location, sharp wreckage and high surf typically found on the site, few have ever ventured to dive the wreck.

The Northern Part Of The Island by plane777 on wiki