I am planning to go solo car camping (inside of the car) in the Clatsop and Tillamook state forests of Oregon. It's free and it's close to the ocean. In many ways it's a spiritual journey, i.e., I need to get out of the city for awhile or I will go insane, but I definitely want to come back in one piece.

I have read dozens of safety tips, regarding how to NOT attract bears to your campsite (car in my case), and how to remain aware of your surroundings - with respect to cougars. However, much of the information contradicts other advice that is offered. Some say that "bear proof" containers are the only way to go - while others think that the "bag trick" is fine; and some say that even an oil leak on my car is an open invitation to a bear.

Can I hang my food, garbage, toothpaste, or petroleum products from a tree - and feel free to fall asleep in my car without fear of becoming lunch in the middle of the night?