Brief addition on the portable storage part of this thread...
I have been using 30 gig Trippers (approximately $260 USD at
www.insidecomputer.com) for over a year with 100% reliability. Like other portable disks, the internal battery's a joke, but Inside Computer also was including a battery holder that acts as an external power supply. It holds 4 AA batteries which then makes the power issue moot; you can easily have enough juice for the entire trip.
Good luck!