The last 2 week trip I did, I carried a DSLR with 2 lenses and 2 batteries. One lens was a 50/1.8 for backup - the lightest lens I have. The other lived on the camera and was an 18-70mm consumer grade lens (good enough and both lighter and cheaper - in case of damage - than any of my higher end lenses). Total weight was about 5 pounds

I put the holster on my pack hip strap so it wasn't on my shoulder, and balanced it with a water bottle on the other side. It was easy to grab and use but out of the way. Then I just had a light day-pack I could stow it in if I was out of camp without the main pack.