Mount the camera on your auger so you can hit the bin easier.  Mount it on your swing so you can line up with chutes easier.  Digital signal never gets "snow".
Our camera kit comes with the 7'' screen for in your truck or tractor and 4 cameras. 
The screen has the capabilities to view all 4 cameras or individual ones. 
Both the camera and the screen require 12V hookup, but they talk to each other wirelessly