Here's something similar to a book dummy, but less paper, less hassle, and much simpler. But you have to be able to write small. I have created a template for studying picture books. Not only is it useful for studying already published picture books, it is also useful for planning them when you write, at least in some stage along your path. Here's what it looks like:
In the few recent studies I've done, I've noticed that the story set-up usually takes 1 1/2 to 2 1/2 spreads. I like to deal in spreads b/c that's universal. The pagination can differ so much among books due to the different ways publishers print the title page, copyright page, etc. That's what the blue X's are for. Most books will either begin with a 1/2 spread OR end in a 1/2 spread. SOME do both. Just begin the book you're studying on the appropriate square. If it doesn't begin with a 1/2 spread, but begins with a full spread, just put N/A on the 1/2 spread spot.
The introduction to the story problem usually begins on spread 2 or 3, sometimes as late as spread 5. As you summarize what's happened on each spread, you will notice patterns. This is helpful when you go to plan your own books, even though the illustrators and editors will have control over how the actual spreads will appear. But if you know you can make it work, then you'll know they can too, even if it's different.
If you'd like a copy, simply right click on the image, save as, and then you can print it. Enjoy!
Keep on keepin' on...