We've have 3 children, we've done a 4 night in a cat. 4, and a 7 night in a cat. 3. When we go again, we'll do the 7 night/cat. 3 ! The extra room was wonderful !! Especially having the 2nd bathroom with 3 girls!!!!! The veranda was huge, breakfast in our room every morning (even the last morning) was great!! When we were in the cat. 4, we only had 2 girls(one stayed next door w/parents), and I think it was tight. We didn't have much drawer space. Maybe we were Really Spoiled by the cat. 3 !! If you can, make sure you get one mid ship, the pull down bed is in the living room and not in the bed room !
Have a great trip with which ever room you choose !!!