I have a lot of expensive photo gear. Sometimes I rent very expensive lenses for wildlife photography. I always struggle to find a good way to secure my gear in my Subie Forester expedition vehicle. How do you secure your gear from theft (don't say insurance, I already have that)? I was considering getting a locking toolbox and somehow cable-locking it to the bottom of the tire well, but that seems kind of kludgey. Any ideas?