One tip if you are leaving kiddos at home....we used webcams to call home. The BEST thing ever!!! The cams are reasonably priced and you can call for for free with skype. One of the most priceless moments in our lives was calling shortly after getting Cana and seeing big brother (10) just sob at the site of us holding his baby sister...joy just overwhelmed him...absolutely priceless!! Also, we made a small video of the kiddos at home to show our daughter so that she'd be really familiar with them. One read a story, one gave a tour of Cana's room, bed, & toys, and the younger ones just played and sang to her.
As far as a diaper bag, a normal/medium size purse is perfect. I knew I didn't want to be bogged down with a diaper bag. All outings with baby are short so you only need to bring a few things. I recommend you be able to sling it across your shoulder.
We were EXTREMELY happy with what we packed. I spent a year reading others lists and made ours from that (I know I'm nuts...had to pass the time somehow)We went as light as we could. We carried on one backpack and checked one large duffle bag. I packed an extra duffle bag and backpack for our goodies to bring home. I'm more than willing to share our list if anyone is interested. We traveled in July of this year. You can pm me with your email and I'll send it over. I updated it right after we got home.
I highly recommend bringing a small can of forumula and a few diapers and wipes (a days worth). We had no time to go to Wal-Mart. We landed late Sunday night, received our daughter early Monday morning, and spent all day doing paperwork. By the evening we just wanted to eat dinner and spend time with our princess. We didn't make it to Wal-Mart until late on Day #2 with Cana. Our orphanage did not bring anything with our daughter...she came with the clothes on her back. We would've been in big trouble if we didn't have that small can of forumla.
One more thing, I promise
Have your camera's READY on gotcha day BEFORE you even get out of the car. We literally walked in the room and there she was...seconds later she was being handed to us. We would've missed everything on film if our friends, who traveled weeks before us, hadn't warned us about this. They missed their entire gotcha moment on film
Okay, I'm done...for now
Blessings!!
YouTube - Cana Day ~ Gotcha!