You'll be frozen long before you get that far. Do NOT rush closer to take photos. Talk, sing, whistle or wear bells. Don't carry smelly food. Don't mess with cute little cubs.
Bears prefer berries to tourists normally.
No fisherman worth his salt is going to tell you, so better hire a guide and a boat. Almost any stream is loaded with spawning salmon by August. For salmon , remember the five fingers of fish. Thumb rhymes with chum, also known as dog salmon. If you're a kid, you'd use your index finger to poke somebody in the eye.