A nice bed on a shelf of granite especially if you bring some dead grass in. Escape route into water below, more rock behind and above and of course right out to the air in the direction of the camera. So a good place to look for scats is outside a rock area beside a pond like this. Look for rocks coming out of the pond and then check the rock and the area just around it. I saw that male otter back in April.
Otters also like to scat on beaver dams.
I have no good photo of that, except this exciting silhouette taken in the winter. Here is a pile of grass two yards up from the pond on a slope the otters frequent. If this is beginning to sound like a lot of work to you, don't despair. There is a way to make otter tracking easy. Go out after a snowfall.