[@King Kindred]

There was also the big boom everyone likely heard. Someone may be able to notice it through the chaos since, there's a lot going on. And a big smoking crater outside the cave would indicate something happened there at least.

Though like I said in the post, anyone who knows Morgan (Even though she hasn't been around that long) would know that cave is where she typically hides out.

So really it's just up to who wants to go, or someone who knows could tell someone else who wants to go.