The way to teach bears that cars are not a tasty target is to keep all the food & smellables out of cars. Rangers are pretty good at enforcing this rule. As long as no bears learn that cars are snack-mobiles, they will not be a problem to any cars. (Does that make sense? No they're not a problem because no cars have any food. At least, that's the plan.)
When you leave your car during the day, you can just hide everything that relates to food ... even empty grocery bags or empty water bottles. Those look tempting to a bear that might be walking by. But I doubt there will be one cruising the parking lot.
Thank you , hopefully, we don't see any cruising bears.