wait for them to leave

You stay in your cave, waiting in fear for them to grab what they can carry and leave. If they could take out your entire clan, there's no chance you could stand up to them on your own.

You hear some squabbling about who gets which loot but after a minute they came to an agreement and headed out of the cave with their bags full

You slowly enter the main cavity of the cave and look around at your fallen brethren, seeing no sign that even a single adventurer had fallen.