The description had some unintended 'hints' which led to me to try some unfruitful methods.
On a trip to the east coast, I showed it to patuxentgang and we started hammering on it. We saw some patterns and after I tried one more thing the numbers appeared. Cool.
Finding the cache was a whole different effort. I looked in the right place first, but didn't see it, so I checked a few other spots where a cache could definitely be. Just as I was getting frustrated I saw it. This camo just gets more and more convincing. TNLNSL.