No one answered yet so I'll take a shot at it. There is no one bag that can do it all because everyone has different requirements, and those requirements change all the time. I have about a half dozen different bags for different shooting situations based on how much equipment I want to carry. For a start, Think Tank cases all come with waterproof rain covers.

I have seen endless articles written about camera bags.

Yep, there is no such thing as an all ocassion camera bag such as there is no all -- female purse, lol. However, one can get a large size bag to store a good bit of equipment (including desacant)in ones vehicle and use it as a replacement center or for choice of equipment needed for a particular day or days of a trip. It seems almost as with tripods, I have almost one for each type of day or short trtip. Now with the zoom as good as they are and with a wide-to-tele range, one or two lenses can foot the bill. So the main camera and a back up (which can be a decent, good, point and shoot) the camera bag is no longer over-stuffed. As mentioned there is no on that will do magic. As time goes on one learns what is needed (cough, cough) what is wanted. good hunting