First, it depends a lot on who you talk to at the local UPS depot. The first time I shipped, it was a little tough, but after the first time, they then knew me, and it was very easy after that. With pre-printed labels, they would have never even known what I was shipping! The first time you go in, look professional! Have a nice insulated box, nicely taped, and you should have no problem.
Yes, they know what I am shipping.
In fact, everytime I come in, all the women in the place come over to me and ask what kinds of critters I am shipping this time! They love leopard geckos, and have learned to like the colors of my snakes, though they still don't like snakes! I have started taking pictures to show them what is in the box, and occasionally, a live animal in a deli cup to show them.
I originally set up an account with UPS, and they mailed me a large package with forms (with pre printed account info), rules, rates, etc. I used it a couple of times, but then when I got my paypal account, and had it linked to that, I quit using the preprinted forms material they sent me. It's a lot easier letting paypal and UPS do all the work--printing shipping labels, taking payment for shipping, etc. Also, with a paypal/UPS preprinted label, all I have to do is drop off the box. No standing in a long line at the UPS cashier since it is already paid for, etc.
I don't know why everyone thinks it is illegal to ship snakes. It is illegal with the USPS because they have rules and they are a government agency, UPS is not run by the govt., so as long as you are not breaking any other laws (like shipping endangered species without a permit) it should be fine. Violating a government rule, that applies to a govt. agency, is a lot different than violating a rule of a private corporation. You could possible get into trouble breaking a rule of a corporation, but do you really think they would bother going after you unless there was big $$$$$ involved? But remember, if there is a loss, you may not be covered. (I have talked to many of the pet shops I deal with, and they regularly get UPS shipments of live snakes, and they do cover any losses, but the UPS rules state that they will not. I have shipped lizards, insects of various types with USPS, but won't ever ship anything live (except insects) with them again. In fact, you used to be able to ship live chickens with the postal service! I think you still can. They loose a lot of packages though, and they can never find them (at least not for a week or so).
Go to UPS.com and send an e-mail to them (to corporate I assume) if you want to check it out more, or ask for a new account package. If insurance on the animal is a big deal to you, then you may not want to go this way.
Rodney