Hey if you can pull it off there is no problem here. Just becuase a cop has a dog means nothing, it can sniff you ass for all it matters, if the officer has no "authority" to search he cannot claim the dog smelled anything. "the k9 unit barked at the car... so we searched for illegal substances." no one will claim it is the officers right, not even a judge, the cop knows that, if you put the pressure on him... it takes it off you. If he mentions anything about drugs... ask him if there is a problem, if he says he wants to search... tell him you need to be somewhere, i dunno you mom called u home, if he says he doesnt believe you and has a k9 unit.... tell him you dont concent to a search repeat the question if there is a problem. If he says he's going to let the dog sniff the car just say no concent to search, if you just mutter ok and he runs the dog around the car and gets a wiff your done becuase u already concented to a search.... Little things save your ass keep it simple and to the stop, there is no need for him to mention dogs or searches if he has no probable cause. and dont keep your sacks somewhere they will stink up the car.