At really low tides you could consider walking to the island from Buddy Road but the mud may be deep and thick. We wouldn't try this ourselves but we're just pointing out that it may be possible. Let us know if you try this approach!
We have given coordinates for the conveinient dock on the south west corner of the island where you can land your watercraft. From the dock there are two short trails onto the island where you can explore this interesting and historic place. There are five structures left fom the original nineteen and they are in various states of repair. You will be able to look into most of them but you won't be able to enter them. A great resource to find out more about the island would be at coleisland.ca. This website has great information and few good pictures of what to expect.
Before you make the trip here you will need to contact Queens Harbour Master Operations (QHM OPS) on marine VHF channel 10. Inform them of the name and make of your vessel, whether you're arriving or exiting the harbour and your destination. If arriving by kayak or other small craft you can also telephone in at 250 363-2160. They Navy needs to know who you are and what your purpose is as they have rules about how close you can get to their equipment at the opeining of the harbour. They are very professional and this only takes a couple of minutes.
The cache itself is an appropriate container for the location. There is no pen in the cache so you will need to bring your own with a pin for the FTF.
Enjoy this experience and please rehide the cache well to keep it fun for everyone.