DD's will be 18 & 21 next year and to celebrate their birthdays they are planning a trip to Disneyworld in Florida. They have been saving up the money all on their own and it will be their first holiday abroad by themselves without relatives to stay with.
They will both be adults however the few friends I have mentioned the trip to have said it's mad that I'd let them go so far by themselves!
Am I being unreasonable to let them have this holiday? It will be for 2 weeks and they will spend their time on Disney property, universal studios or at the mall there, and neither will be drinking alcohol at any point or visiting any kind of nightlife (they are not the kind who enjoy that)
What do you think?