Could've taken one of the (loose) stones out & hid behind.
Could've used one of the existing (BIG) holes for sideways hide.
Could've made a burial cairn, from collapsed content.
Could've...Could've...Could've...
Had 2nd & 3rd poke in the rain, but despite scope couldn't see anything in likely looking holes; might now be under a bit that's futher collapsed.
Unless Jen wants another trip, for accurate location, or you manage to build a slice'n'dice memory extractor, 'fraid it's Requiescat in Wall.
So near, after so much time & effort, yet so far