Looks like a great idea so far!
Love the choice of truck, REALLY wish we could get those in the USA... sigh.
A thought or two.
First will you not have any light into the children's bed areas? The lack may be good for feeling secure, but they are going to want to have light in there. It helps to not feel so claustrophobic. Also you will want to be able to be certain air flow can go through there. We had bunk beds when I was growing up, and they got HOT if you did not open the windows in them.
Second. The beds, you are thinking about shortening the mattress for the girls because they are not tall yet. You plan to put in storage. I would caution you that once the girls get bigger you are going to have a very hard time removing that storage. You will, rather suddenly (in my humble opinion) have a LOT of stuff that no longer has a place in your camper. That is hard when girls get older they will want more space, not less.
Lastly, If you take the bathroom area and encroach upon the current shower by about 15-20cm or so I think you will find that you have enough room to simply put the shower in there with everything in the bathroom. Then the current shower space can become a lot more storage for you.
Just a thought.
I really love your plans, and your floor plans look very wise. What is the large object at the very front of the cabin, near the dinette? Is that a large seating area? Perhaps something that folds down into a pare bed? Personally I would want a pass through to the cabin, you could do one like the Unicats that has the "back rest" section of the seat being removable (in both the couch and the inside rear seat) and thus allow for that pass-through easy enough.
THANKS for sharing! Really cool ideas, looking forward to this one!
"Do you know what a soldier is, young man? He's the chap who makes it possible for civilized folk to despise war." -Allan Massie