Oh dear, while solving this mystery yesterday, we were looking for faaaaar to complicated clues while looking for the right expressions. We had to get back to thinking in the most obvious way, so we could get the (quite straight forward) solution.
While getting to ground zero, we were a little worried, if the cache would be accessible - but there was luckily a nice trail nearby (sometimes a bit icy, but definitely good enough). At the spot, we immediately spotted something, but I needed Jonfen's good ice to locate the cache.
In: (small) TB