I keep a camouflaged poncho (worth the extra to get a real GI one vs. the chinesium ones that melt) in all of my vehicles to...uhh...camouflage any cargo that I don't want to advertise (to anyone really...although I do mentally refer to it as my, "get your own damn probable cause tarp.").I got pulled over by a VA county sheriff last weekend on our way back from a shooting weekend with friends in WV. He did the usual slow walk past the back of the vehicle (a large SUV), and of course saw the payload area bristling with ammo cans, gun cases, gun belts with holsters in plain view. ...
Life hack: as an added bonus, it can be used as a poncho if you unexpectedly get caught in the rain!