Speaking of SD cards, I like them a lot, but to me, they are too small to risk in lots of repeated in and out between camera and computer.
When using my Canon Digital Elph with SD card, I always use a 1-gig card with plenty of capacity, and even then after each photo session immediately transfer the photos to my computer via USB 2.0 cable.
The larger CF card in my older Nikon 995 is fine for inserting in a card reader, but even with that, whenever available I would choose a prompt USB 2.0 downloading just to avoid messing with the card any more than absolutely necessary.
And as others have said, always carry a spare battery, and a battery charger too if on a trip.