We did the Ziploc baggie thing last year for the first time, and it made things SO much easier! I packed one outfit for each day, including socks, underwear, and matching hair tyes for dd (obviously not for the boys, lol), and then made a label for each one that said, "Jacob is wearing this on Tuesday", etc. That way, if I needed my husband to help, he didn't have to think, hahahaa! (seriously though, when it comes to dressing the kids, my husband couldn't possibly put them in matching outfits unless he has this kind of detailed instruction, it's pathetic. sometimes I think he does it really bad on purpose? I mean, what other explanation could their be?) Also, only one of my children were not reading at that point, so the older kids (who were 6 and 9 last summer) could also get out their own clothes for each particular day as well because they could read the labels themselves.
It took a lot of time to get it done, but it saved SOOO much time while we were actually on vacation. Plus, I avoided overpacking (which I used to be famous for). This year, I'm going to cut up fabric dryer sheets too, and stick a small strip inside each ziploc bag to keep everything smelling nice!