We hunt really close to headquarters and everytime we've been there we have heard wolves. We would just howl by our mouths and the next night or that evening there would be wolves close, did you wait a while after calling? I'm no expert by anymeans, it just seems in two different places in Idaho we have been it took a day or a few hours to get them to respond. Maby they were just far off to begin with. It's too bad you didn't wack any, it's seems like there is a bunch in that headquarters area. I would also go to the wintering grounds for the elk and you should find wolves there, I don't think they are too far from pierce.