I'm in the been-to-Q-over-the-past-30-years-and-never-encountered-a-bear camp. Maybe we've just been lucky! (Now that I've actually verbalized this, I've probably jinxed it)

For the past 15 years or so, we simply tie our food barrel to the base of a tree far away from our tent. The barrel has bells on it, so if someone (!) is trying to get into it, at least I'll know it's time for plan B.

But most importantly, we keep a very clean site. At night, nothing odoriferous goes in the tent except a water bottle (not toiletries, not sun block, not insect repellant, not soap, not first aid kit,  and, of course, nothing remotely food related). Everything in the barrel is at least double zip-locked; the only food-related item not in the barrel is our one-burner stove which is stored elsewhere in a double-layered container.