I agree that some burning was probably used to finish the print Steve, but there are a variety of ways to get that type of print that can produce a better result than a bunch of after the fact burning.
The swirling mist against the dark sky for example it is hard, really hard, to burn the sky without burning the clouds some too.
Camera exposure placement is one, a camera filter possibly, print exposure placement choices surely, maybe negative masking...
The thing I'd look for though, if I were going to try and recreate this particular look would be a bright moonlit night. From that lighting condition it might even be possible to print straight, no burn at all.