Hello Andy,
good to hear that Vagrant works for you.
Import / Export from one Authoring Tool instance to another is currently not supported. It is part of the roadmap though.
To connect to to your Vagrant-MongoDB you will need the SSH option when creating a connection. Vagrant uses the same settings on every machine, so the settings from the screenshots should be fine.
Please keep in mind that Vagrant is NOT recommended for production. If you are planing to use the Authoring Tool in production, we highly recommend to use the server install.
Best regards
Thomas