For those looking for the Calliope, I camped out at the spot and only saw him in flybys for over an hour before he finally landed nearby.  However, I also ventured past the orange cone, through the overgrown trail (watch for ticks!) and found him perched again, so don't be afraid to wander a little further if you haven't seen him in the usual spot for a bit. He was being pretty heavily harassed by an Anna's too.

https://ebird.org/view/checklist/S55698330

The third photo on my list is from further up the trail. Happy birding!