Paul, This might have been suggested before but if not have you ever thought of setting up a database of e-mail addresses for ramblers supporters. You could send out an e-mail to them on a weekly basis from the club advertising the match. If each person then forwarded that e-mail to all their contacts and so on it would be a great advertising tool. It might just set the seed in peoples minds who have never gone to a game.
You could also ask people who use the clubhouse or go to functions if they would like to add their e-mails to the database.
Just a thought.