Everywhere it is said Shaolin temple was famous for its staff skills. Some say its staff skills were more developed or more famous than its empty hand skills. We don't see or hear much of these famous skills nowadays. I've seen two staff forms from modern shaolin, yin shou gun and qi mei gun. What others are there, and how much staff practice and two person work goes on in shaolin schools today? It would seem this weapon should have more sets and be focused on more than any other.
Do the southern shaolin traditions, like bak sil lum and hung gar, have "authentic" shaolin staff sets, or are they unrelated?
What staff sets does everyone practice, and what sort of training goes into them? Is there much two person drilling/sparring, or two person staff vs staff sets?

Were the Shaolin staff skills only famous in one period of history, and have since fallen into obscurity or been forgotten?