Just got back from a short weekend here's my list (still on my desk from when I was packing last week):
Clothes (2 outfits/day for warm weather) and a cool weather outfit for night in case we are out and about.
PJs
Diapers (I took a small pack)
Wipes (bought a contianer just for Disney)
Pack n Play sheet
Matress protector
Blanket (one thin and one thick)
Bottles (our daughter still takes a bottle, 2 per day, so 3 big and 2 small, ended up only needing one bottle in our bag for the park)
2 sippy cups
bottle brush
travel formula (for the park)
bathing suits
swim diapers
shoes (took one pair that went with nearly every outfit packed)
crocs for the pools area
bibs
diaper bag
skip hop saddlebag for stroller
toys for hotel room (3 of her favs)
toiletries: Infant Tylenol, Infant Motirn (our daughter had just gotten over an ear infection), thermometer, hydrocortizone cream, neosporin, elmo banaids, baby shamppo/body wash, washcloth, hairbrush/comb, baby sunscreen, toothbrush/toothpaste
I have a SkipHop saddlebag that attached to the side of her stroller, for our days in the parks it held her diaper and wipes kit, a few snacks, some travel packs of formula, and a small toy (musical radio). The outside had a mesh pocket that held her sippy cup.
Then I have a SkipHop Duo diaper bag that attaches to the handles of the stroller. That would hold one bottle, a bottle of water, camera, park tickets, DVC member card, room key, wallet, extra outfit for DD, some drink mix packets, and some snacks.
I think that is all.