Australia's biggest outdoor celebration of country music, the National Country Music Muster takes place at the Amamoor Creek State Forest Park, near Gympie. Subscribe to our free newsletter, Muster, National Country Music Muster, Amamoor, Gympie. Muster 200 Club, Muster, National Country Music Muster, Amamoor, Gympie. Subscribe to our free newsletter, Muster, National Country Music Muster, Amamoor, Gympie. Muster, National Country Music Muster, Amamoor, Gympie. Discount Tickets, Muster Tickets, Muster, National Country Music Muster, Amamoor, Gympie.