If you wrap the wrap with coffee, then a wrap of pepper, then another wrap of coffee this hides the smell! So i am told! never tried it but been told it works!
A sniffer dog would not be fooled by the coffee trick that has been suggested, a dog can search for a specific person across ground where there are 1000's of strong smells, they are asked to find a particular item and they can pick it out from all the other aromas around it.