In the luggage section at Target look for the compression bags that they have. They look like big ziploc bags. You put clothes in them, zip them closed, and roll them to press the air out. It is amazing how much I can get to fit. I can pack a week's worth of clothes for the four of us in two large suitcases. This summer that even included jeans, sweatshirts, and jackets since there was the possibility that we were going to be up in the mountains. The added benefit is that our clothes have been protected two different times from exploding shampoo bottles! With two kids (2 and 4), the less luggage we have the better. I made the mistake of taking small bags for us on a long weekend trip. By the time we threw in my purse, the diaper bag, a small cooler bag, etc, we had about 12 small bags to keep track of. The cuteness factor of seeing our daughter pull a small bagby herself was not worth the hassle of trying to keep track of everything. Travel is stressful enough with two kids!