How to carry all that stuff
I tried the Lowepro Rezo 190 AW camera bag.
Here is my user review
Here's the bag, built with a strong and solid fabric. There's a small Lowerpo logo: let's call this face the front.
Opening the bag
Actually, the front'll be placed outside. On the following picture, the outside face in on the top, and the photographer is on the bottom.
That's important, because the top of the bag opens from the inside face, i.e from the part closer to the photographer
The main benefit of this reverse-open design is, when opening the top of the bag, only the photographer could see what's inside.
Inside the bag
First, there's a protective cloth...
... and then, all the gear carefully placed
A Pentax K10D body with attached DA* 16-50 lens, a DA* 50-135mm lens, a AF-540FGZ flash with its stand, a BG2 grip, a battery, a IR remote, a USB cord, two chargers, a SD memory card, a viewfinder cap and a rear lens cover. Sorry, I missed the power cord
Please note there's room for another lens
Maybe the DA* 60-250
There also a small pocket, perfect for memory cards and a remote. This pocket is closed thanks to a scratch.
Let's have a closer look inside. All the divisions are easily removable, thanks to scratches. The fabric is very soft.
The front face of the bag has another pocket, for more memory cards and slim items.
Against the rain
There's a protective cover included against rain. Opening and deploying it is just a matter of seconds. It stays in place firmly thanks to an elastic cord all around. Obviously, I haven't tried yet this feature under the rain
The strap is large and solid and the shoulder pad is non-slip and confortable. The buckles are only single and easy to detach.
I think I've found a solution to my problem.
The bag is solid and doesn't catch the attention. The inside is easily configurable and the gear is well protected.
The only drawback is the total weight to carry, circa 5 kg / 11 lb
Sorry for the quality of the pictures: they weren't shot with the K10D
All the pictures are available in this album.