Coucou je vais essayer de te corriger!
1) « Did you enjoy the holiday camp ? » « No, not (very much)»
2) We saw (many) interesting things in Nebraska .
3) There was (a lot of) food at the camp but Nathan didn't eat (anything).
4) Before starting the Oregon trail, we need (some) time to think about it.
5) « When did you take a riverboat up to Independence ? » I will take a riverboat in (a few) moments.
J'espère que ma correction est bonne :)