It's fine, Dave, though darker seems good with these dunes to pop them. However one should be bold at times!
In the spring, during the morning Hunter Mountain and the Cottonwood Range can add some dramatic shadows as the sun rises over the Panamint Range and spotlights the dunes.
Most photos of the Panamint Dunes tend to need a long lens since it's a long walk to the dunes from the end of a rough dirt road and there are more accessible dunes in the region besides the Mesquite Dunes that always seemed for me to be more rewarding to shoot.
One long shot that gives one a high POV is along the road to Hunter Mountain. However, I think one of the better vantage points for me was near Panamint Springs which put the dune field in context with its semi-remote environment.
Here's one from years ago shot with a focal length of 250mm.