We visited Yellowstone National Park last year which has both Grizzly and Black bears. Park camping regulations in Yellowstone are pretty strict concerning food storage. Any time when we were away sightseeing or at night sleeping, all food, food containers (coolers, food prep items, stoves) had to be put away out of sight and trash could not be left out. Stowing them in a tent is not acceptable. Has to be in your vechicle or RV. If you don't have the room, Yellowstone provides steel bear proof containers for community use (usually found near the bathrooms) where you could store dry food goods and coolers if you have no other place to put them. The parks stance is if it can give off a scent, it needs to be put away.