Any bear downwind knows of a human's presence when camping. Bear's have a sense of smell something like 1000 times more sensitive than a bloodhound. If anyone frequents backpacking forums, the camp practices vary widely and the topic is like clinchers vs tubeless or wax vs oil. The old timers tend to sleep with their food and use it as a pillow in black bear country. I am more concerned with mice and the like. My pack stays outside with all zippers open. Anything with a smell goes into Smelly proof bags and that goes into a relatively light (3 oz) stainless mesh bag. It stays just outside the tent. I would not backpack solo in Grizz country even if armed.