We've found a couple micros, which seems to widen the search more than limiting it! But yes - that's why we're not stressed, because it might take a few tries to have it jump out. Other logs indicate that their receivers didn't respond well to the area, so I'm hoping that's the only issue...
Is there a tunnel under the highway?
I don't think so! Nothing seems to indicate that so far, but if I discover a mysterious person-sized hole, I'll follow up
Definitely - it seems as though most people are a bit more successful than us so far. We'll keep on it! And that's a really good point about just hearing cacher's stories, regardless of how they end!