All things considered, you did a good job of recovering things in LR. Have you downloaded LR Beta 4 yet? it's got some excellent enhancements going on for it such as a much improved highlight slider (takes the place of the recovery slider) and all of the other adjustments are able to be brushed in selectively. (such as highlights, noise removal etc.. )

In regard to checking the LCD on the back of your D7000... it will never be reliable if you're shooting RAW. That little preview is a tiny jpg that is attached to the RAW file and uses the in camera settings, but is still limited by the actual lcd its self in terms of what you see.

Use the meter and get to know it well. Use the histogram and get to know it just as well. Interestingly, everything on the LCD of my D300 is darker than the NEF always turns out by at least one stop or more. Also remember that when you're shooting in the dark towards a landscape, it's probably better to spot meter. That will at least give you the most accurate baseline to work with since most of the sky is dark.

Good thing you used the base ISO, or else you would have pulled out some pretty nasty noise!

Doug

P.S. Did you know that you can just drop an image or a series of images into terminal (after having launched terminal and after having typed "exiftool" followed by a space) and you'd get the same results?