I think there's a lot of research available on training rats. Rats will chew through concrete. Rats can get through a hole large enough for their skull to fit through. Your trained raccoons are no match for a locked door. All they'll be able to do is bang the garbage can lids together, hoping to lure out your enemy. Rats will find a way to get in & victory will be assured. Unless you opponent has cats. And, just in case, I probably have more cats than anyone else, so I'm your last choice. If you every have a problem with the rats revolting, then I'm your man.