Although my DS is now 16 the ziploc bag is really best for kids. He is now a boy scout, you know (stinky) camping trips, etc., so we use ziplocs for each day's clothes because when you pack you can compress the air out of it and then when the day is done you can return it to the original bag and you dirty clothes and clean clothes don't get all mixed up. Just be sure to mark you dirty bag or some designation. Another thing we have done is while we are there we use the drawers so we can put our suitcases away and if they are in baggies you don't have to worry about "acquiring" any uninvited guests (bugs). I have always packed his clothes in a separate bag so he knows that it is his.