In the early to mid 90's my mom used to lead Sierra Club family trips and I would get to come along for free. These family trips involved bringing in all the food for a 7-9 day trip for 16 people on horse back. This particular year we were base camping near Thousand Island Lake near Mammoth. Two large Coleman ice chests were used to keep all the perishables cold for the week and at night we would pile all the pots, pans, ladles, and lids on top of a tarp to act like a warning alarm for furry invaders. The tarp was weighted down with large rocks. There was no way an animal could get through all of these "defenses" without getting spooked.
Most years nothing bothered us, but this particular year the Mammoth bears had their eyes set on us. Like an invading Mongol horde they hit our camp every night for the first four nights, sometimes they would be in our food 20 minutes after we all went to our tents. But most nights we were able to chase the bears off by yelling, clapping and blowing whistles. Until the fourth night.
We had all gone to bed and about two hours later we heard the clanking, clattering, and crashing of pots and pans. My mom and I, as well as the co-leader and other campers all got out of our tents, we shone our flashlights towards the noise and as the beams came together we see the fattest, goofiest looking bear sitting on his butt with our Costco sized block of cheese in one paw, and our jug of peanut butter in the other. He had unscrewed the cap off the peanut butter and peeled away the cheese wrapper with expert precision. We were all standing in our underwear screaming, clapping, blowing whistles and this bear did.not.move. I even chucked some rocks at him and he just sat there eating, looking at us like "so, whatcha gonna do about it?" He was right, he knew we couldn't do anything to him.
After he finished off the huge block of cheese and peanut butter he grabbed a full loaf of bread and a full pack of danishes in his mouth and slowly, very slowly, got on all fours and sauntered off into the night.
After he left we took stock of our food. He had got the peanut butter, cheese, bread, and danishes. He also clawed at the trail mix, smashed the chips, and ripped open all the deli meats. It was the biggest eff you ever.
The next morning it was decided that the co-leader and I would hike out to Red's Meadow, take our van into Mammoth and buy new provisions for the group since we still had four more days in the back country. On that day we ended up hiking 18 miles and carrying full packs of food.
The bears never came back the rest of the time we were there. I'll never forget that experience.