Vault HA with S3 Backend and KMS auto Unseal - How to use recovery mode?

I just got my first test working with Vault HA using HA storage with consul, and an S3 Backend to allow me to shutdown everything and recover still as a persistance data store. I am also using KMS auto unseal.

When I ran the first test, shutting everything down, and then spinning it up again, it wasn’t clear to me from the documentation how to run vault and recover. KMS auto unseal also doesn’t appear to work in this scenario. Would anyone be able to provide some pointers on what a recovery workflow would look like?