Some of the HDR features of these new cameras from Nikon and Canon will be helpful. For example, The 5D Mark III will do 7 bracketed exposures up from 3 in the 5D Mark II. It will also do an in camera 3 exposure HDR with variable ranges. In the small sample below the Canon in-camera HDR seems to generate some halo artifacts, though it is hard to tell in such a tiny image. The Nikon D800 and D800E can shoot 2 frames with a single shutter release with a variable range option. The Nikon D800 is offering 2 to 9 frames in steps of 1/3, 1/2, 2/3 or 1 EV.
Here are a few more details: