I sincerely was kidding around with the "all or nothing" comment. Of course it is logical that it is challenging to carry much more than a body and a lens or two... thats why I suggested a lens that has an extreme range, is acceptably sharp and has VR.
As to what is everyone's minimum acceptable carrying weight, you may laugh, but I sincerely can (and *DID*) carry around my D200, 5 lenses, an SB-800, 2-4 sets of every battery type needed and a 6-ft travel-pod and HD Sony camcorder all in a weatherproof backpack. To me, that is my minimum when on vacation, and I have lugged it several times now for 14 hours a day, 5 consecutive days.
When not on vacation, I leave home the video camera, but toss in a couple more speedlights, stands, umbrellas and at least one more heavy full sized tripod.
Everyone needs to make their own decision as to what they consider bare minimum. Some want a body and a 50mm... others, like me, will not accept the challenge (or limitations) of not having what you want, when you want... and are more than happy to lug it all around all day long with a smile.
