Use cameras as your “eye in the sky.” Place cameras as high as possible. You can even make the cameras mobile. The general rule is: the higher the camera, the less likely they’ll be tampered with. This also widens the surveillance zone for each camera. However, go too high and you may miss details, so again, be strategic.
https://pro-vigil.com/blog/how-many-security-cameras-do-i-need/