Hi, I'm going on a 5 week trip around the world. and would love to take some photos with my new canon 350d. but at the moment i have only one '1 gig sandisk 11 cf card'. which will not be enough for 5 weeks (how many raw photos fit on a 1 gig card?) also i'm still deciding to shoot raw or jpeg...or a bit of both, any ideas? but what should i do in terms of storing all my photos?