As I listened to a radio commercial a few days ago, I heard the term "unmentionables" used in a context that didn't make sense to me. I inquired about this term with the landowners of this location, and with a bit of a laugh, they explained what "unmentionables" were and why they had that name.
You are searching for a small, camo bison container.
Permission has been granted by the landowners to place this cache, and the friendly faces in the window to the north of GZ are enlightened muggles that know why you are there.
Caching Tip: if you roll the log tightly and place it in the cap first, the container will go together much easier.
If you are curious, you will have to find out for yourself what "unmentionables" are.