BYOB inserts are the solution. They fit a variety of camera systems, with pockets to organize accessories, and their soft shells mold to fit the interior of virtually any bag.
D-ring to attach keys, carabiner or tethered media wallet
Interior zippered pocket secures money, change and other small items
Front and rear pockets for additional accessories
Packlite is a compact, lightweight and fast-deploying camera bag that can be stashed anywhere
Folds up and self-stows into built-in side mesh pocket
Clips onto D-ring or backpack harness to be carried outside bag when necessary