So I suppose that comes down to are we or are we not taking a short rest? Those who are not injured could well set up a counter-attack for anything that comes wandering or lurking but if we rush, we will need expend our very finite resources with no idea just how much further the cave goes for the group. We haven't a way to safely scout through it either, not as with Torus' familiar. Given the ambush could be set and a short rest is not realistically that long a period of time, and we are starting to dip into resources, that is my vote. If we use what we have now we might find our party stuck deeper in the cave without anything versus suffer potentially another attack.