Here is GO User's, MicHawk, organizational confession:
When I pack my kids for a trip (overnight or 2 weeks), each day's clothes are in a gallon size ziploc bag. Socks, Underwear, shirt, pants/shorts/skirt, belt, etc. (Jeans for kids over 6-ish don't fit, so they are packed normally.) This way I can clearly see what each child has packed, I can count the number of outfits they have, and it is easy for each one to find their OWN clothes and to get dressed easily when we are traveling.