Travelling by air brings it's own little problems. Depending on
the airline and world conditions, you may have to remove
batteries from all cameras. It is often better to do so anyway.

Carry gear in a flight bag. each item is in a separate
transparent polythene bag so that it can be looked at.

All film should be kept in it's containers but it is best if
these are transparent. These are then also placed in polythene
bags.

You can ask for film to not go through airport X-Ray machines,
and, sometimes, they will agree. However, I've NEVER had a film
damaged yet, even in America soon after the gulf war - and those
films - up to 400 ISO - went through 4 times in total. This
should not be taken as a guarantee !

Don't video in the aircraft, they don't like it and a video
camera, and similar electronic gear is reputed to be able to
affect modern aircraft electronics.

Keep everything handy so that it is easily inspected. Don't take
large boxes or bags at all. I once saw a rather large chap cause
a lot of trouble on a flight to Orlando when he went on board
with a Sony Pro. 8mm video camera in it's large case. He refused
to let the hostess take it off him, but it was obviously unsafe.
BE WARNED - he lost in the end !!!!