Thanks will give this a try. Also considering having the WP site in an iframe on my NBB homepage, then styling both to match. However, with this option, I'm not sure how best to setup SSO. Is there a way to use NBB as Login, Registration and Profile and pass the info to WP. ie using NBB as the AUTH provider?

@Det-Prest Hello! Depends what plugin it is, we currently have support for paidmembershipspro and s3member, but ultimately any new plugins might need new plugins. If you're on WordPress I'd personally just customize the sso-oauth plugin, and install the plugin on WordPress that allows it to act as an OAuth2 provider.