it is possible to camp. Sometimes you might get moved on by the police or the coastguard, if you camp near the ocean, but it is unlikely. There are often signs displaying what you can and can't do, like swimming, bombing and electrocuting fish and damaging the squirrels. But if there is no sign, then apparently anything goes
Seriously, if you camp, just make sure it's difficult for people to see your tent and you shouldn't have problems.