As others have said on here, you have done well to get some shots without 20 people in the background. Last time I went, admittedly it was the middle of the day, any photos would have required some serious editing to mask various people in the shot. Ive heard even at first light youre likely to not be alone.
On a personal taste note I am not sure if there is too much contrast in the sky for me. Kind of think theres so much going on in the sky it takes away from the main subject - the hills and stones. Obviously only my personal preference though.
Ben