Pretty much anyone
The only requirement is that you are 18 years old, or 14 years old with a parent or guardian. And groups of two or more, like families or small groups, can sign up together.
That may sound like a lot, but you should know this covers everything (hotel, meals, activities, etc.), and this is a number you’re meant to tackle with your friends and family.
Of all of our trip participants, only 5% have had to contribute to their own trip.