Front parking camera

I'm planning on fitting a front parking camera. I've just fitted a reversing camera and due to a search I knew about the interference that you get from the power source and ground. So I followed mike holroyd''s guide of using the interior boot lights for the power.  My question is the which power source  should I use for the front camera so as to avoid any interference when the engine is running. I'm thinking of placing the camera on the grille somewhere.