The CCLI license allows you to reprint a hymn for congregational use. You may make more than one copy of the Hope Publishing copyrighted hymns from the Hymnary website for this purpose. You would report your usage to CCLI in accordance with your agreement with CCLI. You do not need to give us your CCLI number.
We have this hymnal (https://hymnary.org/hymnal/ANH1942), but it needs editing. There is training involved to become an editor; see https://hymnary.org/wiki
It is The Hymnal, Army and Navy, Ed. by Ivan L. Bennett, United States Government Printing Office, Washington, 1942. Would Hymnary.org like a list of contents?
If I knew what hymnals were involved I might be interested. If they are in good shape, a charity that sells used books might be a good place to donate them. If many of them are rarities, a university or seminary library might want them. (One of the Claremont schools has a particularly exhaustive hymnal collection.) Just thinking with my phone's keyboard...
I do have a spreadsheet of the hymnals, listing title, date of publication, and publisher.