First, here's the original trailer...
Christopher Lee went out of his way to publicize the film. Here's one of his appearances alongside director Robin Hardy on a film discussion program in America:
Here's the end of the most recent Wickerman festival held near the film's shooting location at Dumfires and Galloway, Scotland.
Steve Phillips' excellent website on the film has tons of great information on it, particularly regarding the various versions and many scenes that never appeared in any cut of the film and are probably forever lost. Check it out here:
And finally, here's the trailer for Robin Hardy's related film, The Wicker Tree:
Enjoy and thanks for listening!