In the event of a power outage without severe weather, I would think just about every corps would have a generator right? What's the point of spending millions on all this stuff and not a few grand on a generator?
The question is more weather related. Then the question becomes what happens. I know I saw spirit at one if those shows and thought it was better than at rehearsal that day with the electronics (not ragging on the electronics just thought that it was a great performance). However, I can see how some corps may not cope as well.
Lastly, wouldn't general effect have to be scored lower for someone like crown if it does in fact hinder their program?