My husband went with everything but the kitchen sink - both our birth certs, his divorce decree, the death cert for my first husband; our marriage cert, his son's birth cert. Copy of his military discharge, RCMP check, my taxes/W2s... The immigration officer wound up only asking for and taking four things: his divorce decree, the death cert, our marriage cert, and my taxes. Double checked our address and contact information. That was it. So while I wouldn't say only bring those four things, I also will say that you shouldn't need to stress over it. As the officer told him, if something else were required, or if they wanted more docs, they would have told you before you were DQ'd.