Down for a long rest.
Not sure I'm ready to totally abandon the boats & supplies. There may be one or two left, and I doubt what's left of the kuo-toa will want a fight with us...
Plus, not sure heading into random tunnels is a great idea. We don't know who (what?) made them. We don't know if they have any other exits at all, or where they might be if they even exist. Finally, we have no idea where they actually head. We've only seen one tiny section. That it looks like this one small part may head vaguely toward Gracklestugh doesn't mean it continues that way.
So...gonna think about it while we wait for JustinCase to post. Maybe he'll have thoughts.