One of the things that pushed me to digital was my getting sick and tired of having to argue with the TSA over film - and contrary to what they say, the xray can cause problems on any film, not just 800+.

Alot of the disposable cameras come with 400 or 800 speed, which makes them more sensitive to the xray than 100 or 200 film.

When I was in Japan, I went to a camera store and bought a very thick lead pouch to transport my film (I still carry around a disposable to/from Hawai'i for underwater photography) - it works like a charm and the screeners only removed it from my bag and checked it manually once. You may be able to find a similar pouch at a good camera store and use it to carry your film or the disposable camera itself - I just sent my parents to Las Vegas with their disposable camera in my lead pouch.

One question: why choose a one-time use camera? If you want high quality photos, but don't want to lug around a more expensive camera, you can get a really cheap, but decent auto-load camera with abit of a zoom at most drug stores - then purchase some high quality film for the shooting. You can re-use the camera while keeping the cost impact from its loss or damage low. This is what I did when I was sea kayaking, and the photos turned out much better than any disposable.