These creatures knew where you were the minute they heard your vehicle coming up the log roads, toward your camping spot. They were communicating with each other, whistling, chatting, wood beats on tree stumps. These creatures are like any other wild animals, they are opportunistic animals and having keen smell, eyesight at night superior to none.
[Question:] Would you rather have to jump on a back of a elk or deer and drag it down and kill it, taking a chance of injury, or smelling something that is being cooked, the smell filtering through the forest?
So here they come looking to get a easy meal like a bear does. They move in slowly, but with stealth, and wait for you to go to sleep. And then move in for any leftovers, coolers left outside, any wild game that has been killed while hunting, and any food bags hung from trees as a bear precaution.
While you are out hunting away from camp, during the day, they send the females or young ones in to steal anything that is available. Just how many times did you blame the poor bear for tossing your camp when you were away?