1) My sister is going to spend three weeks, from 4 August to 24 August in the USA.

2)In particular, they will be visiting Disneyworld first, then they'll be flying to Yellowstone Park and finally they will round off (?) their journey with a three-day stay in New York.
3) Can you please suggest to me what kind of clothes shall they pack in their suitcase?
4)Will they have to pack anoraks, wollen/fleece jumpers and heavy hoodies, too?
5) Will they have to buy phone cards to phone to Italy? Which is the cheapest way to phone from there?

Thank you all for your cooperation.
The questions above were real questions.