These are the "secret" scrimmages where media aren't allowed, but reports/stats often leak out.
https://watchstadium.com/news/not-so-secret-list-of-2018-college-basketball-scrimmages-10-09-2018/
https://watchstadium.com/news/not-so-secret-list-of-2018-college-basketball-scrimmages-10-09-2018/