its not a good idea to mislable the box or not label the box at all.
if something happens and the shipping company finds out whats inside the box it can create problems for everyone that deals in snakes.
its also a violation of federal law (the lacey act) to ship a animal without the box being propery labeled, the feds say the box must by labeled indicating a live animal as well as scientific name, but just listing live reptile, live snake, etc.. is ok for shipping within the USA
Your best bet is probably Fedex or northwestern ... UPS allows lizards and turtles to be shipped only, Delta and most others will ship a snake but you must be a registered shipped with them first which is a long involved process.
I just bought some BP's a couple weeks ago: albino het pied and dbl het albino/pied ... the guy shipped them UPS in a unlabled box with no air holes, he packaged them good inside but still ... the snakes arrived in pretty beat up shape, lost one within a few days and 1 other one still isnt looking/acting that great. The box of snakes probably got tossed and banged around bad since it wasnt labeled.