Honestly, I leave my Lowepro bag in one designated spot, and take my camera, and my main lenses with me, and I just wear a 3 pocket (waiter/waitress) apron. It ties around my waist and has the slots for my lenses, so it's easily accessible. It's black as well, so it just blends in with my black pants and shirt... I dunno, works for me 

The weight on the waist is so much more comfortable for me (obviously your mileage may vary).
