When not being ‘occupied’ by a cat, my standard camera bag holds my Canon 5d Mk2, Canon L series 24-105, Canon 50mm 1.5, Canon 85.. 1.8, extra batteries for the camera, and four 16 gig memory cards in an awesome Pelican CF card holder. In an additional bag goes flashes, flash accessories, extra batteries and the battery chargers – I also carry my own power strip to gigs to line up all those chargers, just in case.
I’m currently investigating new camera bags, as the gear (as well as the cat) has outgrown the ancient one I’ve had since college. Any suggestions for what works for you are most appreciated!