Actually, it is not against the rules and regulations of the USPS to ship live animals but there are some restrictions. These can be found in USPS Exhibit 526.6. Small, harmless, coldblooded animals are allowed. They cannot: exceed 20 inches in length, need attention such as food or water during transport, cause unsanitary conditions or have obnoxious odors. They must be able to arrive in good condition considering normal transport time between point of departure and destination.
I have shipped and received many animals via USPS, including Bearded Dragons, and only encountered one problem in a shipment from CA to Michigan during a holiday week. One thing to consider is whether or not the receiving post office is a major hub. If not, overnight may not be guaranteed. If this is the case you can arrange for pick-up at the nearest post office that is a major hub. I did this in July with a shipment coming to Michigan from Connecticut. My post office is not a major hub so I asked that the box be marked for pickup at the Saginaw, MI office before being sent to my city. The gentleman working the mail dock called me less than 5 minutes after the box arrived so that I could come pick it up. Very smooth shipping experience.



