After completing the adventure lab on the other side, we decided to attempt to locate the cache, "another day, another adventure" by foot that was on the other side of the island and recommended by kayak. We decided to place a cache out here just to make it worth it while attempting to bushwhack to the gz. Happy to say that we were able to located the cache! So it is possible to get by foot if you choose to do so. If not, here is a much easier cache to locate!
Can be accessed by foot or kayak/canoe/boat but you would need to exit the vessel.