Last year, I packed from an "outfit" list -
For both kids & myself (I let DH worry about himself), I had a list of each outfit(s) needed for each day.
For the kids, I put the whole outfits in gallon ziploc bags (shirt, shorts, underwear) & labeled the outside of the bag - Monday, Epcot. On some days, we had dinners scheduled where I wanted the kids to be in "fresh" clothes so I put those entire outfits in bags as well & labeled them accordingly - Friday, Dinner - Ohana.
This way, both I & DH knew what the child was wearing on what day and/or event. It was also easy to grab the bags out of their suitcases, lay them on their beds, & then let them dress themselves - w/o rummaging through the suitcases looking for matching shirts & shorts.
However, we were there in May, so I don't know if you can fit an entire outfit for February in a gallon bag, but the principle is the same.
In the same vein, I also planned matching outfits for all of us, so we knew what color was for each day - Monday was Epcot & Blue Shirts, Tuesday was MK & Disney shirts, etc.
Then, after I was sure that everyone had the right outfit(s) w/ all the accessories (underwear, hairbows, etc.) for each day, I packed the "extra" things like sleepwear, swimsuits w/ coverups, hats, & shoes, & a couple (or 3 or 4 or 5) of additional outfits & pairs of underwear & socks for each of us.
I also pre-packed the bag I took w/ us into the parks w/ ponchos, sunscreen, band-aids & Neosporin & 1st-Aid spray, lip balm, lipstick & compact (for me!), camera film, small notebook & pen, Tylenol & Benodryl, wipes, antibacterial gel, extra t-shirt/shorts & underwear for each kid, small sunglasses for the kids, etc. (Believe it or not - all this "stuff" fits into a small-to-medium-size messenger bag!)
We always drive, so I always overpack. But some "extra" essentials (besides the normal stuff) - scissors, tape, paper & pen/pencil, ziplock bags, rubber bands, safety pins & small sewing kit, Lysol (I spray the door handles, remote control, etc. when we first check into our room), spray bathroom cleaner or wipes (so I don't have to worry about our toothbrushes laying on the sink & don't have to worry about the kids sitting in the bathtub), paper plates & napkins, paper towels, flashlight, nightlight, sound machine, envelopes for tipping the mousekeepers, and my list goes on & on!
I've thought about the over-door organizer for this trip, and, in theory, I think it sounds marvelous. However, I don't think DH nor I are self-disciplined enough to get the stuff back into the organizer after we used it - everything would end up on the sink anyway!
Have fun! I adore packing!!