Ah yes, mid to late august, that's a great location to find BH. Those two shots were in glacier park too, but very little of the Park is open so I rode my bike past the gates as far as I could them hiked the rest of the way. I seldom go to logan to find them anymore.

Of late, over the last two/three years, the sheep have not been as dependable as they once were around logan. They seem to move around a lot.

As for how close you can get, youre right, if you get in a position to "intercept" their movement and sit still they soon will ignore you. However, this is not always a good thing as once they ignore you, they also tend to keep their heads in the dirt, so to speek, sleep, or, they put their butts to you.

Dull, overcast light is the BEST for BH's. I would give up 10 days if shooting them in the sun, for one day shooting them in overcast. . .