Personally, I'd take as much as possible from home - just in case the stores don't have stock. A few extra pro-packs in your carry-on won't add that much weight and the load off your mind will more than make up for it.

I find when I'm shooting, and the subject matter is begging to be captured, I shoot loads - you might find yourself using up more than you think and then start worrying about saving film until you get to the store.