Bears may enter campsites during the day, even if people are there. Keep a clean camp. Put trash in bear-proof cans and dumpsters regularly. While Day-hiking Properly store all food and related supplies left at the trailhead, including ice chests. Don't leave your backpack and walk off to take a photograph.
Bears know packs are a source of food.
Lodging Store all food and related supplies indoors. Put all garbage in bear-proof cans and dumpsters. Take infant carseats out of vehicles when parked overnight. Never approach any bear, regardless of its size. If you encounter a bear, act immediately.