Location: Skylar’s Riddle
This treasure hunt requires a bit of puzzle-solving, if you want to figure out the password on your own. The stash is located inside the bunker near the house. If you go inside the bunker, you’ll find six motorized fish decorations with corresponding numbers. You have to activate the fishes in the correct order to open the door. There are two ways to figure out the passcode: by finding the cheat sheet inside the house or by powering up the other set of fish decors inside the house and taking note of the order they get activated.
If you power up the generator inside the house, the second set of fish decorations will move. Take note of the color of the fishes and the order they moved. That sequence is the pass code.
You may not have time and patience for that so you can get the actual passcode located on the ledge above the generator. After climbing it, it will be pitch black so just keep moving forward until you see a light and bedding. Read the note to find out the code.
Of course, if you can't be bothered with the process, you can just activate the fishes outside the stash door in this order: 2,4,6,1,3,5. If you entered it correctly, you'll hear a loud click and the door to the stash should be green and opened. Treasure hunt complete!