I Have a Nikon D700 plus a Nikon 24-70 mm lens , battery pack- soon to buy a 70-200 mm lens. Plus SB 600 flash .

I am a middle aged women with a troubled back. So I need a lightweight backpack. Investigation has drawn me to the Lowenpro Flipside 200.

Question - will this fit my gear as mentioned above? Also will the bag able to carry my camera with one of the above lenses attached + battery pack?

thank you

Sue