I originally started by adding a publisher to the recordings, but it has a deprecated warning. I went through the IRC chat logs and @reosarevok and @Zastai seemed to think the same and mentioned a ticket for it: http://tickets.musicbrainz.org/browse/STYLE-315
I also thought about the publisher at the release level. From what I was reading, I though only executive producer, mastering, art direction, and such applied at the release level. If it was not clear which tracks had some recording attributes (e.g., violin played by xxx at the release level, but not all tracks have violin), then placing these at the release level was better to avoid implying more knowledge than we had.
According to the booklet "all compositions published by Steve Haun Music (BMI)" confuses things slightly, because we don't know if we considered the arranged nature sounds as compositions. Since he chose different recordings, arranged them for a purpose and mood, I considered them compositions.
I'm sure I'm overthinking this - lol, but I have been using these releases as a way to try to fully understand the release groups, releases, recordings, works, and all the relationships.