you can get portable solutions now that doesn't require you to haul your expensive laptop with you. They are essentially portable DVD burners with card slots.
Unless you have a burning desire to see and edit your shots during the trip, you could consider that as an option - on the other hand: how much for card-RAM can you get for the same price and would that be more useful to you?
I have an advertisement somewhere in one of my photo-magazines. I can look for if you can't Google it and is interested.
The trick with RAW is that for those 999 shots that you don't blow up to poster size, JPEG is great: smaller prints and your PC monitor.
Then you get that one KILLER SHOT, but the exposure and colors are not exactly like you want it. RAW gives you more range and control to post process.
It's a "damned if you do, damned if you don't" situation..lol.