Sorry I don't own a Nikon D7000, but I guess it fits since Canon 5D Mark II is much larger than Nikon D7000. (Full-frame vs. 1.5 crop) This bag is fairly small so a large lens will cause problem. It does not fit my wife's Nikon D3 .
Yes, a D7000 with 18-105mm DX lens, with hood attached, and Manfrotto 200PL tripod plate attached will fit. A Nikon D610 with 24-120mm f4 FX lens (with hood reversed) and Manfrotto 200PL tripod plate attached will fit.