Changing default config for the Membership


I know that the Membership plugin stores options in wp_options and the rest of the data in tables with prefix m_. I would like to know how could I set some default configurations when the plugin is activated.

I’ve thought about using register activation hook and then do a insert query with the data on the database, but this hook only works if it is written inside the function and I would like to create this as a mu plugin so it doesn’t mess with updates of the membership plugin.

Any ideas?