You really want to lug a d7000 backpacking? Might as well throw in a few rocks as well.
Wow, you must be weak.
Let me guess, you are used to carrying a big heavy FF around, and have meat hooks or hands? The d7000 takes two hands to shoot. There are plenty of smaller dslrs out there, anddslrs are about as big as they come, so yeah, it is not small. Maybe its small compared to the biggest ff, but thats about it. No thanks.
I DO have a "lightweight" setup that I carry occasionally, but most often I am carrying a D7K, Bigma, 24mm, 35mm, and 50mm primes, an 18-55 VR or 18-105 VR, 105mm Macro, Tokina 12-24mm, one or two SB600's, a bunch of filters, extra battery and memory cards, etc, etc. It's about 35-40 pounds, and then I often add a tripod or monopod.
My "lightweight" setup is the D7k, a flash, and 4-5 lenses (not including the Bigma, at 4.5 pounds), plus some accessories.
Besides, you SHOULD be using 2 hands to shoot, proper hand-held technique makes for sharper photos.