The Horseback Riding trip

This book is about a girl scout troop that decides to go horseback riding. As they go on their journey they see a lepricahn that is in trouble with an evil sorceress.
Now its up to Mrs. Cindy and the troop to vanquish the evil sorceress and free the leprichans.
There is just one question that remains can they vanquish her and free the woods and the leprichauns? Can they make the woods safe?