I am thinking something like this.
You will have to let me know what elevation you want the sun. It's best not to be directly overhead so that there are some shadows to show the terrain better. And you will have to let me know how far off the sand you want the camera, this is a meter or two above. I suspect you might want the camera higher.
Because of the volumetric clouds, these renders take over 8 hours each for me. Constructive feedback please!