We cruised last year in a category 6 (verandah cabin) with our 2 DSs who were ages 16 and 13 at the time.
It took a good 24-36 hours to get down a pattern of walking and where we each put our stuff down when we'd enter the cabin, before we stopped bumping into each other. lol
After that, it wasn't too bad, and we were on a 10-night cruise. (Courtesy of Hurricane Frances).
However, for next year's cruise we've booked the same exact cabin for DH and I, and have booked the category 11 cabin directly across the hall from us for DSs. They will be 18 and 15 at the time, so that's why we're comfortable with them being across the hall, rather than in a cabin next door with a connecting door.
Your DDs are a bit younger than our DSs, so I think I'd go with the connecting cabins.
P.S. If you do end up all in 1 cabin, here's what we did that made things a bit easier:
We each had our own "zone" in the cabin where our clothes, souvenirs, and other items were kept, so that nothing would get lost, and no one's things would get confused with anyone else's.
For example, DS16 had the left-hand side of the desk area, including the cabinets that went up the left side, to keep his clothes and things in. He had the left side of the desk itself to lay down his room card, sunglasses, etc.
DS14 had the right side of the desk area. That's where his clothes were, and that's where he stored all of his things too.
Then that blue "chest" in the middle of the wall was where I kept most of MY things, and I used the top of the chest as a landing place for my sunglasses, room key, watersafe, etc.
DH used the dresser over near the bathroom. He's diabetic and had a lot more "things" to keep track of, and that's also where the cabin steward had placed the Sharps container for the used syringes.
We all used the closet for our dress clothes and shoes.
This really worked out well because when we'd all walk into the cabin together, we each had our own space, even if it was only a 1' square surface
The privacy curtain was nice too. When we'd go to bed, we'd pull the curtain over most of the way, and it gave some privacy while we slept.
Have a great cruise!!
