Umm... you sit and wait... and get very bored, then ask if your spotter is willing to felate you in exchange for your MRE dessert package. If he/she says yes, then great, you just found something to do to pass the time. If no, then... well... you touch yourself while looking at the bad guys (or good guys) while looking thorough your scope.
As for camping, yea, airsoft is JUST like C.S. If you are within 20 feet of an enemy location for more than 2 minutes, then you are kicked and banned from the server.
That's all you get, since you don't trust me (according to your profile)