I used to do camps too....
Among all the camp-sites, camp christine and seribun camp most
jialat...
Most of the time, just wait it out. just make sure the victim
doesn't hurt himself/herself. Don't try to do anything funny if you
are unsure as the spirit may transfer onto you or come play with
you later at night from personal experience....
zhlow - what eightball suggest is right.
The right thing to do is to keep calm, and make sure the victim
don't hurt himself/herself. Never never try to do anything, even if
you think you got some knowledge, as the chance you make it more
mad and cause more damages is more likely. Usually it
will go away, if not bring to temple or church or mosque depending
on the victim religion to seek help.
The best thing is prevention, - do not anyhow do things, or
anyhow say things, alway do things in groups, respect the place you
are camping, and acknowledge that you are borrowing it to camp.