Setting Patreon access details

I’d like to set a time period for keeping Patreon-only posts available to patrons before then becoming public. One of the patreon benefits is early access to my podcast; so I’d like for the locks to expire after 48 hours.

Any thoughts on ways to automate that?

Yes, Patron Plugin Pro premium addon provides that. The gating methods ‘Show last X’ or ‘Lock last X’ are what you need.