Sounds like a bit late to chime in, But I am also happy to offer the Playpen for you to use.
The Playpen was built to demonstrate functionality of Moodle to new and existing users. All areas have guest access and users can create their own accounts to see fetaures as formal users as well.
If you like, a course can be setup for yourself with teacher access if you need it.
Email me if you want access.
Julian