Unfortunately The Marquis Los Cabo is an adult only resort. No one under the age of 18 years old will be able to attend the wedding.
Don't forget your passport! Please allow yourself enough time to secure a passport. https://travel.state.gov/content/travel/en/passports.html?gad_source=1&gclid=Cj0KCQjw-e6-BhDmARIsAOxxlxX_Efuv9loZ1hDbZ2Oi-OWeWnXxnrw82n1TNiZM1ykpwj-TY8URll0aAo_5EALw_wcB
If you received a plus one they will appear when you RSVP.