One other thought - when last in Cornwall did you get to the Minack
Stunning position carved into the cliffs near Penzance. They have
matinee and evening productions until mid September - they're doing Pearl
Fishers for a week in early September and then Gilbert and Sullivan's
Pirates of Penzance - if you can cope with G&S I'm sure it'd be great fun!
The companies appearing are usually amateur but the atmosphere is terrific.
Take a cushion to sit on and wear plenty of warm clothes! The views as the
sun sets over the cliffs, coves and Atlantic are fabulous. They have an
excellent website with a webcam: