That happens quite often with me too. Whenever I'm ready to take a shot, the camera breaks down or the surroundings change drastically. Then the moment is lost forever. That is the tough destiny of a photographer.
Indeed... but since I would not be able to touch the setup for 3 months I knew this was a risk... It's a pity I missed this very special moment, but after all I'm happy with the overall result of my experiment.
Passion for creativity and engineering.