Sorry, no recent observations for me either, but from past experience I'd say crampons won't be necessary. I few years back I went there in late-July during a high snow pack year and the approaches surrounding Cirque Lake were all still snow covered (with the exception of the south buttress on Pingora, which was dry). The snow pack received minimal overnight refreeze. We approached Wolf's Head, etc. with axes and found that the snow was soft enough to kick good steps. I'd recommend an axe at least.
Also note, if you plan to climb Wolf's Head, the snowfield above the grassy ledges was still large and melting considerable water onto the ledges. They were so wet, we opted to approach up Tiger Tower gully (4th class on the right of Tiger Tower) and found the approach to be simple, fast and dry. The rap from the top of Tiger Tower onto the East Ridge of Wolf's Head was simple and straight forward.