I've been going over older posts that have said it's mentioned to have all pages copied in the instructions for filling out the petition. Since those were older posts though (dated back in 2012), I think they might have changed the requirements and all pages are no longer required (or so I hope) because it's not mentioned in the instructions when I read them. I reside overseas so it'll be a bit difficult should I receive an RFE, that's why I'm freaking out a little. Also, pretty sure having the intent to marry on a joint letter is fine. As long as you've both signed, that should be all that matters.