I'm currently doing the Debt Collector quest. Lady Jane directed me to a destroyed caravan in Broc Flower Cave in order to retrieve the caps she owes, but while there is blood on the floor there is no brahmin. I've read other forum posts indicating that Lady Jane may have lied about there being a caravan in the first place, but even if that's true, finding the caravan isn't marked as optional and I don't know how to proceed. :/ Does anyone know a fix?

I have the same problem. I went to the cave but I don't know how to finish the quest.