I would consider getting a bunch of
memory cards. They are so cheap now and as such its feasable to get lots of them for travel purposes. 10 years ago a 256MB
memory card cost me $250, now I can get a decent fast 16GB card for $40! Out in the field having lots of
memory cards saves the hassle of backing up when I could be enjoying other things when I am out doing a project and it allows time to concertrate on planning the next days shoot etc, whilst backup can be left for when I return home.