I'm thinking about taking my gf, sister, and cousins to anaheim. I was reading on the internet that an adult that is not their parents has to have some sort of consent form. I am taking my sister and my cousin is taking his sister. They are both over 16, but not quite 18 yet. Will I have troubles at the airport even though we are siblings and have the last name?
Are there any costs with any paperwork if we do need it?
Thanks