Bring your set of pictures, your passport, proof of initial entry into Canada (boarding pass, stamped passport, visitor record, etc) and your OWP for sure, and then anything else the letter asks for. Mine had an easy to read list (with highlights in blue and yellow for important points, lol, very organized). If any info has changed on your passport or birth certificate (name change, passport renewal, etc), bring confirmation of that. The letter will say if anything else is needed. You also bring your copy of the landing letter, printed out. Your sponsor needs government issued photo ID but a drivers license is fine.
They checked the PA passport, asked for verbal confirmation of current address/contact info, asked where we got married, confirmed first date of entry, and wrote ‘void’ on the OWP. (They didn’t keep it, though.)
After that, they ask the questions about crimes, then they congratulate you! You initial the info on the COPR letter, then sign. You get a copy, your photo is attached to their copy, and you go get your new SIN and start living your life in Canada as a PR!