When I taught first grade this was my Writer's Workshop bible:
As you get to know me you will find I'm a a very type A person (Mr. M would say A+) so whenever I dig into a new book I always read it cover to cover first. Then I go back and reread it and pull out the pieces I want to incorporate in my classroom. Then I make myself a study guide. Here are the study guides I have made for these two books. I would absolutely recommend buying the books or checking them out from the library and reading them yourselves, but these guides might help you to see if they have material you would be interested in and if they fit into your Writer's workshop.