She's still pretty young to have had much experience with leadership. She may have good qualities as far as deciding a course of action that seems right, but that's not the same as understanding where other people are coming from and how to work together to determine what's best. Is it an option for her to go back to the camp tomorrow?

Have you considered having her read some books about leadership? How to Win Friends and Influence People (Carnegie) is a classic and might be a good start. Learning to see things from the other person's point of view is so valuable. She doesn't need to beat herself over not doing that naturally. For most of us, it is certainly a skill learned with practice and by learning (books, TEDTalks, etc.) the fundamentals.