Canon 7D, 10/22 EFS, 18/200 & 50mm 1.4.
The camera/lens/flash storage insert that comes with the "Kata DR 467i" will require creative adjustments to carry your gear. The 7D with a lens attached will probably lay sideways for the best fit. The divider that separates the top and bottom compartments will unzip for more room, though this is probably not the right backpack for the job.
I've been experimenting with carrying camera and lenses in the top compartment while filling the bottom with spare clothing, food - basically things that weigh less because my back likes the heavies riding up higher. But the padded insert doesn't fit or zip closed very well when it's used up top, and my home made solutions are proving to be tricky