Bug-a-bags for catching Japanese Beetles (Junebugs) work amazingly well, and you dump out the bugs once a day into your chicken coop for a treat for the girls, and see a hundred beetles fall into the coop. It does make sense that smells can attract an animal, even a smart one, in the woods for quite a distance. This has been field tested many times, and some studies have looked into primate preferences. Offer a chimp a bowl of raw meat and a bowl of cooked meat, they often take the cooked meat first.
doi:10.1016/j.jhevol.2008.03.003 (duke.edu)
Think how much better it smells when a neighbor cooks burgers on the grill, than when you do yourself. And you can smell them from a block away. Cooking your own burgers while camping, that scent is travelling for miles, potentially, at levels that a dog can pick up. While we know nothing about the brain of this animal, how large their olfactory centers are, or how sensitive their noses are, you can smell food at a significantly further distance than you can smell uncooked food or blood I'll bet. And I'll bet, being a primate of some sort, they are attracted to the smell of cooking meat. On top of that, those scents burn pathways in our brains, allowing us to recall memories we thought we forgotten.
Study suggests that exposure to different smells could help improve memory : NPR
As to what would work? Who knows. Nothing works consistently, I guess, or we would see one at every picnic. A Gift of a cooked burger placed downwind outside of camp seems like a great place to start but a great place to attract the attention of bears, racoons, and about a hundred other species which may land you in real danger.
Also, I saw a documentary about the subject of human pheromones once, and it didn't work out for the protagonist... "Perfume" it was called. That guy knew scents.