I was the editor of the NPS quarterly journal in the early 1980s. The group folded because an immature officer refused to release the membership list so that the journal and newsletters could be mailed; he repeatedly denied his involvement and soon thereafter founded a new group under the old name.
The journal and newsletters were a gold mine of alternative process and soft focus lens information but the real education was to participate in the mail portfolios where you could hold master prints in your hands. Members such as Karl Struss would answer your questions over the phone. It was a golden age.
What a shame it was killed by one person.