A picture book text can paint a picture or it can set the stage for a corresponding visual story. Sort of the difference between
… and sailed back over a year and in and out of weeks and through a day…” (Where the Wild Things Are)
In the great green room there was a telephone …” (Goodnight Moon).
The first one paints a mood that the art alone can’t tell. The second one creates an image that accompanies the text. Both are good for the story they are telling, both create a visual without taking over for the artist.
The trick, as a text-only picture book creator, is to realize that you are a visual artist. Your text needs to create moods and images word by word, sentence by sentence, and it has to do it page by page and beginning to end.
One way to set yourself up for success in this area is to storyboard. Storyboarding your text will give you visual feedback on how your text works on each page. If you have a text-heavy page, you’ve either stepped into the artist’s area, or you have too many words, or your story may not be best suited as a picture book. You also need to be aware of your page turns.