We do Tinkerbell gifts. Every night Tinkerbell sneaks into the room and leaves something. I tend to go a little overboard but it cuts down on the "I wants" at the parks.
I usually do PJ's, swim stuff for the pool. This year I have a swim suit for each girl, flip flops and a toy (these are from Nemo). We do T-shirts, light up toys for night time, disney rain ponchos, and usually a princess dress. I don't usually do one basket when we first arrive, but spread the stuff out over the whole vacation. You can find all sorts of Disney stuff at the dollar store, discount stores etc-Have Fun!