AWS,
First of all... by NO MEANS did I intend to say you were less than ethical... I am also concerned with ethics, but I see this as legallities which here in this state you almost have to be a lawyer to hunt and not break any laws.
I have done a few searches now, and found very little on hunting with lights... it appears you are absolutely correct about their use only being prohibited during big game seasons, I apologize for confusing the situation.
The problem, as I see it, is you must obey the laws pertaining to any game in season at that moment... if Spring Bear is open anywhere in the state today, you must comply to those regs... no matter what or where you are hunting. Bears are big game so are you hunting coyotes with lights illegally then?
Even if I am coyote hunting, I never ever take the plug out of my shotgun... somewhere, some bird is in season, and I don't want to get caught with too many shells in my gun... or even the possibilty of putting in an illegal shell. Better safe than sorry.
The other problem, as I see it, is unless you already have a dead coyote in your truck, local law enforcement is going to try to accuse you of poaching deer.
I am also fairly sure that you cannot power your light from your truck, and that you cannot hunt within 50' of said truck with lights.
But I may have misread that part too!
I am VERY interested in the outcome of this, I believe all our westside coyotes are purely noctornal and night hunting may be the only way I am ever gonna see one.
Best of luck!
Jeff