Vehicle Security Cameras

Looking for ideas on good security cams to monitor outside of truck while away fishing etc, have had issues with vandalism in past, not sure how the wifi ones work either, I may not have access to wifi, does it just store in camera memory? Thanks for any suggestions

 

Common way to do it is a dual dashboard camera. Requires wiring a rear facing camera. Also requires a constant 12 v supply. This is so the camera can be available if it detects something while the vehicle is off.