How do you avoid alerting the perimeter defenses?

[Xathule]

I'm just driving around vaguely near a camp, and even though there are rocks and walls between me and the camp, the alert goes off and out of nowhere I get pelted with mortars.

Is there some way to avoid these activating?

[Denniss]

its like a proximity alert and uses some kind of countdown. You'd have to eliminate any perimeter dense of that base to prevent it. But then it's not far to actually take over this base.

[BlackWater]

Eliminating snipers (at the camps - not the lone ones) is the easiest way, lots of times I'm not ready to take a certain camp, but don't want the constant alerts either. Until certain stronghold project is up and running, when you do take a sniper down, its worth harpooning him out of the tower or just pulling the tower down for ammo. The body dissapears quick, but the ammo pack remains.