DEFINATELY bring your own camera. . . can not stress that enough....I love photopass and use it every trip, it is great but they can not catch the candid and unexpected moments that are the one's you will rememeber. You also can't always rely on Photopass pictures to turn out well, a few are awesome, some are good, others ok, and some, like those on your own camera, just plain bad. Photopass is AWESOME for evening photos of your entire group (they use tripods and can really catch the lights, particulary on the castle and at HS)...but think of your camera as the American Express card, DON'T LEAVE HOME WITHOUT IT!
Moment's I've caught that Photopass would not have - my daughter's face as she saw Tink fly from the castle . . .my daughter and her brother holding hands approaching Space Mountain, my son hiding under the table at CRT while Jasmine bent down to give him a kiss...hundreds more...so many awesome memories where there are no photopass people to be found . . .
BRING YOUR CAMERA!