re: With the AAPPN site (Gravity Form Member Form) you are helping me with do I use the Gravity Forms User Registration add-on or will I be using the Connections add-on for Gravity Forms?
Both. You would create a single form and set up both the Connections Connector and the User Registration add-on feeds.
re: Assuming we want the user to create their own username. Is it an option if we have users submit Gravity Form and it creates their Directory Profile but we as admin person creates their WordPress username manually and email this to them?
As far as user names go, you’ll be limited to whatever options that are available in the Gravity Forms User Registration add-on. Looking at the Gravity Forms User Registration add-on settings it seems you need to add a field to allow a user to choose their user name.
Hope that answers your questions!