If the disposable camera uses a film speed of 400 or less, it can go through the xray machine for carry-on luggage. You don't want to place it in your checked bags but your carry-on is fine. I have taken lots of film through the carry-on x-ray machine without a problem. Also, just to reinforce what bg4 said, I have also sent my digital cameras through the xray machine without a problem. Have a great trip!