It can't be emphasized enough - you simply need some sort of support system if you want good nighttime photos without flash (and at Disney, flash generally doesn't work very well because you're far away from the things you're trying to photograph at night, like the castle, etc.)
OK, you don't NEED one if you have steady hands like a gunslinger. But for the rest of us, you need something. Since you have a PnS, you can probably get by with a cheap tabletop tripod (though they're hardly ideal) or the smallest-size Gorillapod or a Clamperpod (you'll want a ball head to go with it). Some people even like to use small beanbags, there are even ones specifically designed for photography.
