Believe it or not, I just set it to 25s exposure with a 10s countdown, balanced it on a canoe seat, propped up the camera with my wallet to get a reasonable angle toward the horizon, hit the shutter and crossed my fingers. I did that maybe, 7 times or so. Worked through a range of shutter speeds between 10 and 30 seconds. I got 3 keepers but the one I posted was my favorite.
I've been really happy with those kinds of shots on the G7X. I've got a few more from other evenings that turned out equally well as far as clarity goes on the stars.