Come with me by yourselves to a quiet place and get some rest.
This friend said that for the oranges and reds to really pop you need to have some green in the picture. We need to see, by contrast, just how orange or red or yellow the leaves really are. I think we also like to see the difference between what was and now is. Some leaves that have not yet surrendered to autumn help to tell this piece of the story.
So when you are out and about taking pictures of autumn, find patches of green and include them in your shots. You won't be sorry.