I got such a feeling of "joy of life" when I was up there among the carvings. I didn't feel there was a deep religeous significance. I think that on different mornings, one of them said, "Oy fink I'll do me a little drawing today. Ta-ra Mum." Across from the campground there are the remains of the camp where they lived. Beth took photos of that.
I just found a pic of Beth teetering on a rock. She scratched up her leg on a thorny bush. Got knocked into a sitting position by the wind, luckily on a round rock, not a pointy one, but it didn't stop her.