CoursePress Pro, Membership & Multisite...

So, I have a multisite network with CoursePress Pro, Memberships, Users Syncing and so on installed.

My online course is @ with the CoursePress Theme.

My sign up / marketing site is @ with an entirely different theme.

I want people to go to my marketing site, learn about the course, and then sign up for a membership to access my courses.

Once they are a member, the courses are "free" – but the user account and membership info need to pass from the marketing site to the course site.

Is this, or some variation thereof, possible?