Currently I have a small camera bag that fits in the bottom of a standard sized backpack. In it I put a camera body and two medium-large lenses. It works well when I have a specific location in mind and won't take any photos until I reach that destination.

Now thinking about buying a Peak Design Capture so I can attach the camera on my backpack strap. Any experiences with this one?

Ideally though, Id rather just have the camera attached to the back/outside of the backpack, and have it sit there firmly so it won't flop around. Have you found a better solution?