I don't think I'd have that issue with these rocks as they are quite large. I'd remove the smaller rocks the the top boulder which I can see under the the left boulder which is in sand...and get a good look at the last boulder before movement. It's under that last one where the caves are.If I didn't see it by Wednesday am, I'd probably go looking, but again, if you move rocks without knowing where it is, you run the risk of fatally wounding the nem if it is connected at the juncture of two rocks.