Gorelith, you should not have trouble with the possiblity of the mites spreading if the right procedure is taken. As soon as a new snake arrive, we let it soak for about an hour and throw away any container it came in( pillow cases, deli- cups, etc.) After soaking we put the snake in it's setup enclosure( Which has been sprayed with Black Knight.) We also spray around the quarantine racks with the BK and turn the airfilters off for a few hours so it does not filter out the BK.
I look Fear straight in the eyes and laugh my head off!!