Steve, the musical about hoppers was called 'Bendigo Boswell' - it was composed by Peter Allwood (based on traditional tunes), book and lyrics by Jeremy James Taylor.

It was recorded for the BBC back in 1983 by the National Youth Theatre. I remember watching it but very little else, except that the plot was basically 'Romeo and Juliet' and there was a singer who wandered through the whole thing like a greek chorus, commenting on the action to the tune of 'Rigs of the Time'.