I wouldn't count on anything resembling internet speeds that we're used to. My wife traveled through Africa a few years ago and she could rarely get a connection to remain constant long enough to get a proper email out. Perhaps it's gotten better since then or perhaps you won't go where she went, but I certainly wouldn't depend on using the internet without a solid plan b. That being said, transferring gigs of data from an internet cafe isn't that ideal to begin with.
I would get a budget laptop with a big hard drive or perhaps an external drive (if you're up for lugging it around).
Can you edit from the camera? I bet if you cut out useless stuff every evening or so it would really cut down on space usage.
Enjoy that trip!
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