At the first stage you’re looking for a container which is also a tool, let’s call it "your fishing pole". Take your fishing pole with you and follow the coordinates in the container a short distance up the trail to "the fishing hole".
The fishing hole contains a cache container called the "little fish". Catch the little fish using your fishing pole and in that container you'll find the coordinates for the "big fish". The big fish is the final stage cache container located nearby.
Before you rush off to land the big fish, please put the little fish back in the fishing hole exactly as you found him. You will use the "Noodling Method" to catch the big fish, so please also return the fishing pole to the first stage location exactly as you found it!
Ok now go get the big fish!