Am concerned by your post that most children failed to finish. I was sort of assuming this was an easy peasy thing and I did not need to get into full worry mode re missing children/injuries/abduction/drowning/general woe and horror. Seems I was wrong!
This was the practice hike she did. The qualifying one is later on in the year. The leader did say that this was the worst ever weather they had for a Bronze one. I don't know about your area but here it was very cold and wet. So, don't worry. It can't be as horrid as it was this weekend.