This is the method we use when travelling with our film in this x-ray happy day and age. We have experienced no problems in Australia, USA, Central and South America using this system to get your film hand checked with even the most strict security personnel.
All you need is several heavy duty ziplock bags and one or more extra small rafters bags in Black nylon which are available from most good outdoor stores. Your first step is to take all your film out of its boxes and plastic cans and put it all in one ziplock bag ( handy hint we always carry some 3200 iso film mixed in with the rest, you can point out that its high speed film if you start to get the I have had way too many coffees and donuts today……. look from the staff).
This little bag holds up to 40 rolls of film. I have travelled with all my film in these many times now and have had no hassles at all. Handy hint write your name and address and email on the label or bag with a reward for its return. Happy trails!