Thanks for the tips, Terri. I'll play around some more with the raw file.
The park itself is not that big, but it has a little bit of many features that you would find in the region's parks -- an arch, a couple of hoodoo like rocks, boulders, sulphurous rocks, etc. The park entrance is some 11 miles from the exit, and there are paved circuits, a visitor center and also campgrounds.