With it being so hot outside, I'm afraid of leaving my cameras in the car because I don't want the heat to damage them. I was wondering what I could do to keep my cameras cool when I do have to leave them in the car? I would like to be able to just put my whole camera bag in something because I'm not sure what affects the heat would have lenses and all my accessories? I have a backpack bag with a digital and film camera in. Also, what does everyone else do with there stuff when they have to leave them in the car on a hot day? Thanks in advance!