After this weekend I'm sure someone will come back with beter beta on conditions, but here's my thought. For the most part it is still winter in the Sierras. Meaning there is tons of snow everywhere and proper equiptment AND training on how to use it are necessary. The trail may be packed down all the way to Trail camp, thus making crampons only useful in the early morning if it is very icy. Though, if you do not know how to use crampons, they can be dangerous and a false sense of security. In my opinion Yaktrax are not backcountry items, they seem to be better suited for icy roads and driveways. My thoughts.
Eric