Mike, I can tell you based off of three different doe hunts I've been on that this year had significantly less sign than I saw 2 years ago, and the year before that.
In terms of trails, tracks, and droppings, I'd venture to guess that there was only 25% of the sign I've seen in the past. No idea if there are other factors at play (in other words, I'm not trying to speculate that the herd number has dropped by 75%).