First of all, it would NOT look like a camera bag, but more like a diaper bag or some other undesireable carry-all. It would be small enough to carry easily and would
hold all my equipment not already ON the camera. It would have space for four or five M4/3 lenses, extra batteries, extra cards and filters along with the camera manual. It does NOT need a space for the camera itself. That I prefer to carry around my neck always ready to use. So, leave out the space in the bag for it! It would be well padded so that if it were dropped, it's contents would not be damaged. Oh, I would also like space for my wallet and perhaps some make-up as my camera
bag doubles as a purse for me! I have not found this bag yet, but will continue to search. The Velocity 6X came close, but was just a bit too small and looked like a
camera bag...a No-no for sure!