You can do either the activities bookings, or online check in first - it's up to you. One note, you must be paid in full to book activities.
You can complete the online check in, leaving her information blank. Or say you're using birth certificate/driver's license for ID, so that you can get to the PAT page. All information blanks must be filled in on the early pages for the PAT page to unlock. That information could be the correct info, speculations, gibberish. The system only recognizes that something has been entered.
Got it. Thanks for the info!