The correct answer if it hasn't been stated yet,(not bothering to read all this) but it is not so much what you put it in to mask smell it's how long ago you put it in there, theres science behind it, everything is porous so smell goes thru it, for example if you plan to get over Mexican border with ten birds,(kilos) don't package them and hide them 2000 miles from the border you wait til your just off the border then put your extra wrap of Reynolds wrap, candle wax coffee bean whatever your using and then store it, if you use the same vehicle over and over agin you will be caught no matter how you package it, I have friends that happen to know things..