Howdy folks

We've had a few weeks away to get some things organised whilst Maria was in the country, (got our venue, band and photographer booked for May 2019! major stress relief there)
I have also booked my travel to head to Minnesota (I fly via Canada) on the 10 September. We plan to get 'married' that week. The next steps are:
1. Maria will post her passport the next day (est. 13th september) to get her last name changed to mine.
2. I fly back to N.Ireland at the end of the week.
3. Maria's passport returns hopefully two weeks later.
4. Start collecting and posting all the requirement sheets from my end to her in Minnesota.
In regards to 3:
1. We have our boarding passes from her coming here in June and also me in April and can provide Septembers as well once I return to N.Ireland. A useful thing to add to the documentation?
2. We spoke to a couple who has been through all this (F - UK, M- US) and they suggested we put in photos of us with other people? is this a good idea rather than just 2 photos of just us?
3. Also with the photographs, I understand they have to be printed on photo paper - So then do we just stick these (think photos are normally A5?) to an A4 page and annotate where and when they were?