Get rid of the boxes. That's what I did on 3 different trips going to Brazil, Paris, Europe. Removes as much waste as possible.
If you take a roll a day, that should be enough.
Brazil, I took enough for 2 rolls a day for two weeks. Shot a roll of 220 a day, in a RF645. Came back with film.
Paris, I hardly got through a roll a day, 5 day trip. That was with the SWC. Came back with film.
Europe, away for a whole month, I packed a roll for every other day, and by midway point I went and bought an extra couple boxes of 5 just because I was afraid I'd run out.
Don't skimp on film.