Jacques,
nice result, and since you have dealt well with one of my nightmares (a subject with too much contrast for a straight print and sharp, complicated boundaries between light and dark regions to make dodging tricky) and since, unlike Michael Reichman's example of blending two shots at different exposure levels, this is done from a single image, I am curious about how best to do this sort of thing.
How does your method compare to adjusting contrast on a single high bit file output from raw? I suppose one point is that you can avoid excessive reduction of local contrast levels within each of the two regions (sky, not-sky), but could that be done be selecting regions in a high bit depth file, and applying brightness adjustments locally --- is that harder, or impossible?
P.S. The image also suggests that the supposedly limited dynamic range of digital cameras is not as bad as made out, at least with your Fuji, and perhaps more a matter of needing "digital printmaking skills".