I have used the remote battery kill switches that Hotronics sells. It has been knocked off by others now, but I still buy from Hotronics. Hide the remote toggle anywhere under the dash and the kill switch can be hidden around the battery. I also have toggles to shut off fuel [mine are all electric fuel pumps] hidden. I have driven my F100 and my 40 coupe to many events [in fact every car I have owned] and parked in motel lots all over the place. Never lost one yet, but all are insured just in case I do. If you can't rest at night without worrying about your car, then what fun is that. Yes I would hate to lose my 53 F100 or my 40 coupe that I have touched every nut and bolt on, but if I can't drive em, why have em?