prouboy - Google this phrase:
"Cliff Jacobson" +"ask any newcomer"
See <insert heavy sigh> the 2nd result, Pg. 188

Disclaimer:
Jacobson is a wonderful speaker/ententainer. He really honestly is. That said, I do not support many of his "bear proofing..., storm proofing..." assumptions nor do I believe his advice applies in the BW/Q where we have no way to control what odors and/or lessons were provided by the party that camped at a site days/weeks/months before us. I believe bears, just like people, are opportunistic creatures of habit, mostly looking for the easiest path to pleasure and timing is everything. Hey, whatever works.

Odors and plastic? Try this test:
Grind some coffee (or whatever - substitute dead fish...if need be - in any case, something "we" might notice) and seal it up in a plastic bag. Put that bag inside another plastic bag and hide it in your car. The next few times you open the door, consider the belief that a bear's sense of smell is said to be ~7 times better than a bloodhound's and  (what?)  2100 times better than ours. Sit bobo sit. Good dog!

Cliff has always seemed, to me anyway, proud to say he's never had a problem. I've conveniently hung my toothpaste (my bad) for 20+ years too. Do teeth holes in my gas can make me more or less knowledgeable? No, it's a good story though.

He has a plan, as do I, as do others. Choose and apply any ideas you find that might work for you, add your own ideas and cross your fingers. Forget about your food and your trip. Share your findings, considering their cumulative effect on those that follow in your footsteps.