Should "two-week" be hyphenated in "a two-week all-expense-paid trip"?

Question

Which is correct — "a two-week all-expense-paid trip" or "a two week all-expense-paid trip"?

Answer 1

A better phrasing would be:

A two-week all-expense trip.

It should be "two-week" in careful English, though the unhyphenated alternative is also acceptable in slacker prose.