Here's another suggestion Enfamil LIPIL makes pre-packaged powder in a small tube shaped package, that makes 4 ounces. The bottles we use are the disposable drop in style. We throw a few packages of the pre-packaged formula into the baby bag and add as many drop ins as you want and with 1 or 2 bottles you are set and it is very compact. It's all plastic so no worries about breakage and the drop ins don't have any air in the bottle so less gas problems and they are dispoable so if you are on the go you don't need to sanitize a whole bottle, just the nipple. It's a great system.

Also if you have the room I'd say for a week 3 complete sets of cloths is needed. Baby's can get messy from all kind's of things. When our baby's were smaller we allways carried extra cloth's and we still have an extra change in the car when we travel. Did any one mention bibbs, they can go a long way to save the cloth's from what ever.

Good luck and congratulations!

Adam