Every Thanksgiving my extended family rents a large house at the beach. There are usually about 16 people there, of which I contribute 5. For those 5, we only bring 2 suitcases, 2 backpacks, and carseats. There are only a few toys, unlike the hundreds of overflowing toys at home.
There are clearly some things missing, like clothes for the other weather, but still, we do very well with very little.
One important factor is the help we get. For example, with other adults around, we have time to keep up on laundry, washing every day, so we only need 3 days worth of clothes.
It's something we think about often when working on decluttering and pondering how much we really need for our happiness.
-Jay on a Pocket PC phone