I had to bring everything from the biometrics appointment letter to the approvals. Simply bringing in the two papers that granted you deferred action and work permit will not be enough! Beware. Maybe it was just the workers at the DL office....they seemed a bit anti-immigrant unless you were a citizen or green card holder. Anyways, bring all your application materials and papers that granted your the status. I have a state id now

It's pretty handy if you don't want to carry around your DL.