Hemlock: According to the guidelines http://www.geocaching.com/about/guidelines.aspx#offlimit
"if we see a cache description that mentions ignoring "No Trespassing" signs (or any other obvious issues), your listing may be immediately archived."
If there really is "unspoken permission to hike up there" then maybe you could get them to remove the signs. Until then this cache will remain archived.
Thank you for your understanding.
Hemlock
Volunteer Cache Reviewer