So, I'm really trying to figure this out within the next 2 days since I'll be flying out on a trip Sept. 28. I'm a fan of camera bags. I find them easy to access, you can carry them in a variety of ways, they don't hang on your back making you sweat when it's hot out, and you can also have a backpack for other stuff (like a water bottle) at the same time. BUT, a camera bag that would carry all of my equipment plus have room to grow in the next 2-4 years (another 2 lenses, another flash, and a second body) would need to be the size of the Lowepro Nova 200 AW or 5 AW (the latter being discontinued, I'm told), or nearly the size of the Magnum AW. In other words, those are MASSIVE BAGS to be carrying on your shoulder. Alternatively, the Lowepro Mini Trekker AW backpack should work for me with room to grow. So now I'm starting to seriously consider whether or not its wise to actually have both a bag and a backpack, each serving their own purposes. For example, for my upcoming trip, I'm going to be driving to a lot of places, then getting out and walking around for a half hour to an hour, photographing, and then coming back to the car, likely needing 1-2 lens changes plus a tripod (though the tripod isn't a necessity). I think the backpack would be good for that. Alternatively, when I go to the campus observatory or to a friend's wedding, a bag with readily accessibly gear that can just sit next to the computer would be easiest. Does that make sense? Have other people found this to be a good approach? Any other advice?