END3: Cache would go missing every few weeks or so. Likely a combination of human and environmental variables.
Tribal Dancer: The cache has been there through an entire winter of bad conditions, and has been found by over a dozen people. It has survived being frozen solid, rocked by waves (it was always on the interior of the wall), and swimmers throughout a summer. I'm familiar with various knots, via being a former aerial rescue guide, and each time I went to check the missing cache it appeared the knots had been purposely undone. The exception being the first time where it appeared the entire setup was removed (likely because of the ongoing construction at that time and my bad timing). This was not a poorly thought out spot, or effort. This cache was meant to be a slight challenge, with multiple ways to approach it (ex: walk, swim, kayak, etc). The correct warnings were put in the description to inform anyone that if they wanted to find this cache that they should do so safely, and under the best conditions.