Turns out, when you're at the top of the crater looking out towards the active caldera, you can see the trail that exists at the bottom of the extinct caldera. And there's a path. That you can walk.
That's right, there are people at the bottom of that hill.
We had parked at the Lava Tubes overflow parking, so saw this view on the hike over to the Lava Tubes entrance and main parking lot. The path down to the bottom of the crater was near that entrance, we think, across from the Lava Tubes entrance sign. Unsure about that.
What we are sure about is that the hike down, across, and back up was not the journey we wanted to make so underprepared. Or maybe not at all, given the hike back up for Mom.
So, we just looked at it. Maybe next time.