Instead of putting the film in your carry-on, unwrap it and put the bare cartridges in your pocket. Put your other pocket things like pens, change, keys in your baggage. (Keep your wallet in your pocket.)
When you pass through security, empty your pockets into the basket provided, TAKE BACK YOUR WALLET, and proceed throguh. The little basket will now contain nothing except your film, safe.
Never leave your wallet in a basket or tray, you could get called away or called aside by the security agent to wave a wand over you.
One advantage of having film developed at Disney is then you have fewer cartridges to carry back and possibly get X-rayed.
Blank film with clear negatives, black prints if printed anyway, or black slides (transparencies) is not fogging, rather it might be due to a malfunctioning camera or accidentally submitting an unused roll for processing. Fogged film has dark areas on negatives including the borders and sprocket holes, prints with light or pastel areas, or slides with clear or pastel areas.
More Disney tips:
http://members.aol.com/ajaynejr/disney.htm
9/65
Disneyland
3/75 (World Inn* off I4 near DD)
4/85 (Kon-Tiki* on 192)
'80s Disneyland once or twice
7/94 PORiv (DxL)
9/97 ASMu
11/98 ASMu
12/98 (Knights Inn on 192)
9/99 ASMo
12/00 ASSp
11/01 ASSp planned
*no longer exists