Those are amazing shots! I love the setting and great idea for the backdrop to your self portrait.
I wouldn't know how to fix it myself, but I bet there's some way to avoid/fix those white speckles in the sky above you. Actually... is that a photographic side effect or are you just able to see the stars in the sky before all the sunlight disappears? I hadn't thought of it, but I suppose that's possible in areas away from cities with little or no ambient light.
Either way, your stuff looks great!