Hi Wisedave.
Sorry for my slow reply. We haven't run any of our scheduled test cases against this yet but the there is a blog post online where we got our inspiration from -> http://blog.giuseppeurso.net/moodle-and-wordpress-single-sign-on-in-20-minutes-part-1/index.html.
I've been able to create a dummy account and purchase a dummy course via Wordpress/Woocommerce and have Moodle authenticate the dummy user and allow access to the dummy course with this setup.
Once we complete our testing I'll do a write-up on the steps etc.
Regards.