Welcome to FlyerTlk, hilldee!
I travel with 29 GB of CF for a two week trip. I also carry a Vaio SZ laptop to preview the images. Anything I want to keep is backed up daily to DVD in the field. I don't delete anything until the images are safely on my home system.
More realistically, since you will have an Internet Cafe around every corner, 2 to 4 GB should be more than enough for your needs. Take a break every few days to back up the flash to dvd at an IC.