Used to carry a lot of rope when I went hiking in the back country. The routine was to take the bag with the food and tie it to a rope. Throw the other end of the rope over a branch at least twenty feet in the air. Pull the food sac all the way up to the branch, and tie the rope, as high as you can reach, to another food bag or something that weighed the same. You lied a knot with a big loop in it. You then got a long stick, and hoisted the bad as far up as you could while still being able to reach the loop with the stick.
In the morning, you use the stick to until the knot on the one bag, allowing the other to crash to the ground. Didn't eat many eggs in the bush. Never had any bear trouble either.
Where I camped there were far more tourists than residents of the UP. I doubt the bears have figured out about humans, other than see and avoid.