Nice capture Stuart..It must have been a great experience....great eye contact with mother and cub both looking at you. If this were mine I would crop more from the bottom above the blurred foreground grass, maybe take a little bit from the right and I agree about a slight contrast adjustment to make it a little darker and give more detail to their fur. I have never seen bears in the wild so I am assuming that this is their normal or summer coat coloring. I would also move your signature over to the bottom corner so it is not distracting.
" In every walk with nature one receives far more than he seeks" - John Muir
Wow what a wonderful image. I love the eye contact from both bears, the light & the environment. I would agree that trying a bit closer crop might be worth while.
Gen