You go for orientation to get to know others. It's for you to
mingle around, get to know some other people and have some contacts
for mutual support during the first few semesters.
Most importantly, you get to know a few seniors, who are highly
invaluable for advice, guidance, and old textbooks.
I went for engineering camp just before I matriculated in NUS
four years ago. I've just graduated. No regrets going for that
camp, man. I'm still in touch with many members of my orientation
group, and my seniors were very helpful in guiding me along
undergraduate life.
If you go there just for the sake of hanging around with people
you already know, then it totally defeats the purpose of
orientation camp.