I've looked all over and all of the sling style bags have a small access panel for the camera, but it looks like if you want to get to the lenses you have to still set the bag down.
The problem is that I need something I can get into quickly and easily to swap lenses. Usually at an event or a shoot I would have the camera already out and on a sling strap going the other direction I want to be able to swing the bag around, pop off the lens on the camera and set it in the bag, remove the new lens and place it on the camera, zip the bag up, slide it back and shoot.
Does anyone have a bag that this works out well on? I considered the LowePro Passport but it would flop around to the front while kneeling or leaning forward. The LowePro Slingshot (and the knockoffs) have a nice strap that prevents this, but by the look of it you have to remove the bag to safely get to the lenses.
Does anyone know of a bag that would be more appropriate for this type of use?