I have had film hand inspected which means swabbed for explosives in both Canada and the USA in both big and small airports and the procedure is usually easy and quick, just leave a little extra time so you do not feel rushed. On the other hand I have taken film through carry on inspection Xray in Canada the US and Cuba with no harm to the film and that included 400 ISO films. The ones you are taking are slow films, unless you go through multiple inspections I would not worry about it at all. If you are going to go the route of hand inspection make everything as easy as possible for airport security, it is only natural for a person to be less helpful to some one who makes their job more difficult and more cooperative to some one who makes their job easier and is polite and friendly.