Question was on ants, they usually do not pull doors off.
I live, work and play in bear country and have done so for over 38 years. I have had bears walk through campsites during the day and night, before, during and after eating, when we have been sleeping in tents or sitting out, once a grizzly walked under a hammock that my dad's girlfriend uses to sleep in brushing the hammock while she watched him walk under her, bears in yards and met them at parking lots and on trails. Carried food in backpacks during the day, cooked at picnic tables and ate at the same. Stored food of all sorts in vehicles, cook in many of our units and keep all the food that you would have at home in our units all this time and never an issue. Can it be a issue? You bet it can, but so can it be an issue with any creature that is looking for free food. Is it as bad as people think? Not even close. A trouble bear can do damage to a vehicle or a camper but most bears never have and never will. Have had more damage done to vehicles by sheep and goats licking salt off and climbing on them to get to more salt.
I prefer to store all my food stuffs in the vehicle then hung in a tree or in a bear box. The only time I would store food differently is if I was in a tent or a soft sided camper and did not have a vehicle with me (not sure how that would happen with a soft sided camper).