What camera do you carry and is it a camera specific backpack?
I'm looking for something lighter to take on my travels to Canada in September.
I've just weighed it specially for you! The word "light" doesn't feature at all. It's a loewepro specific bag, inside of which is a Nikon 600, 18-35 1.8, 24-85 3.8-4.5, and, wait for it, a Tamron 150-600mm 5.6. I took the tripod, filters and other lenses out and it still weighs in at 5.44 kg. Bloody Nora...
Do you look at DPreview? There is some very slinky looking stuff coming from Sony.and Fuji at the moment.
My wife has a Panasonic Lumix LX3 which is fantastic as long as you are happy with a very limited zoom.
Canada eh? Lucky thing you.