We are traveling in April with another family. My window has opened to book port arrival time, excursions, etc. since its our third cruise They however are first time cruisers. Can they checkin with us at the port? Also, can I call Disney Cruise to get them the same port arrival? We are linked together on the site but I cannot activate their activities yet. Kinda strange to me. I don't see the point of being linked together if we can't plan at the same time.