If you scroll up a few inches, you'll see a response I posted a few minutes ago concerning the 1933 census of dependent children. That census has an entry for Ozark Mountain School, in Hulbert (in Cherokee county, OK). It was described as a private institution for 19 dependent white children, age 4--18. There was no mention of the Seventh Day Adventists.
Maybe if you feed some of that infomation into a search engine (such as Google.com) you'll find something on the Internet.