Update (5/18): Private Property Alert!
I received a note from Doug W7ZV letting me know that I had crossed private property on my hike to Wagner Mountain. In fact the SUMMIT of Wagner is apparently private property, owned by Young Life's Washington Family Ranch. The river map I was using did not indicate this, and there are no private property signs in this remote area. In short, I had no way of knowing that I would be entering private property on this hike.