When I'm working (I'm a photographer that does a lot of nature and wildlife) I carry my DSLR on a strap, over my shoulder, with a lens attached so that I have easy access (usually one hand on the grip and the shutter release). I carry any other photo gear (lenses, flash, etc.) in the top of my pack and wrapped well for protection. My tripod is strapped on the outside of my pack. If it's wet, I have an Aquatech hood that will be on the camera. I don't have any special cases or anything for my gear because it just doesn't work so well for me. I have several thousands of dollars invested in my equipment (mostly in my f/2.8 lenses) and I am careful with it, but when I'm working (anytime that I'm out with my camera) it's covered by insurance.