QUEST RELATED UPDATE: Ok, let me lay it out for you all. In the savannah, the skull can normally be found s,se,se,e,e,s,s from the crater. It is right on the northern boundary from the savannah to the desert and should be just laying around. The Tsol'aa should be easy enough to find, because the frickin rooms are named after the inhabitants.

NON-QUEST RELATED UPDATE: The blood pear you get from the tree can be used as a prickly pear if the cook is dead and you don't feel like waiting for him. Just pop it into your rift, but be warned that once it goes into your rift or pocketbelt, it can't be used as a blood pear anymore.