We are a family of 4 and we pack light, for a few simple reasons--I don't want to lug tons of stuff around, and I don't want to pay to check bags.
For our 8 day trip last December, we had 4 carry-ons, one backpack, and my purse. The backpack and my purse each contained a quart size ziploc with our toiletry item. My boys are 8 and 11 so their clothes are getting bigger, but I still had room to get each of their clothes in their own carry-on. This is how I do it...
-We all wore our coats onto the plane. We needed a coat in case it was cool, since it was December. Obviously since you are going in a few weeks, that's one less thing you'll have to worry about.
-We all wore our gym shoes onto the plane, since those are bulkier than sandals. We each had our sandals in our own carry-on, outside pocket.
-Since we were going for 8 days, I packed five outfits for each of us. That was shorts and tees, but I also packed 2 pairs of pants for each person in case it got cold. I planned to do laundry halfway through but packed one more outfit to each beyond the halfway mark, in case the boys got an outfit really dirty, didn't have time to do laundry at the halfway point, etc. Obviously the key to that is you need access to laundry, but most places do.
Obviously you don't have to worry about cold weather so it should be even easier for you. If you're going in a few weeks it's going to be very, very hot and sticky. You won't want to be wearing tons of clothes, lol, pack the lightest clothes you have! You may want to pack a few extra shirts because it will be so damp, but summer tees and tanks take up very little room in a suitcase.
If it were me, I would easily be able to fit everything for a ten day summer trip into 4 carry-ons (knowing I would be doing laundry). Now getting home a ton of souvenirs...that's another story!
