Hey Jake,
Thanks for reaching out!
Our plugins unfortunately do not provide features “out of the box” for making the sort of calendar you describe, which only logged-in users can see. However, it is technically possible with a bit of custom coding and tinkering.
While we cannot help with writing custom code ourselves, we have put together a knowledgebase article here that covers some of the basic ways you can go about achieving this → https://theeventscalendar.com/knowledgebase/members-only-calendar/
Check out that article and let me know if those ideas are at all helpful—I’m sorry for the lack of options here, but I hope this helps! 😀
George