Hi,
Well, I can tell you my experience and bear in mind I am new at digital phtoography.
For xmas, my dh bought dd and I Cannon Powershot S330. Love the camera and we just got back thursday from a disney trip.
We anticipated running out of battery time, so we took an extra battery along . Wow, I am SO glad we did that.
I took 200 picutres over 7 days and had to change the battery twice. DD told me night shot take more battery juice, too. Remember to take along your charger, too. We bought a nice little camera case before trip at Ritz Camera made by LowePro. It is small, but has poockets for an extra battery, and a pocket for memory card. DD wore the camera case around the parks.
You'll love your camera at Disney! We took all our pix on one 128 mb card. Be sure you have enuf card space. Our picx were awesome.
We saw lots of the little Cannons cameras being used by visitors around the parks.
Herc.