I am looking at the RV3 for the kids room to use with our KK. I like the look of them. From a touring point of view I have found a swag much quicker and more efficient than a tent set up. Even for a trip like yours I would consider a swag in conjunction with your tent.
I spend about 50-100 nights per year camping for work and swags win hands down. The worst part I found touring with a tent (ours was the SC ultimate trekka) wasn't the ease of setting up the tent, but the bedding was a PITA. The time it took to unpack the sleeping bags, self inflating mattress, pillows, blankets etc from their individual bags and then wrestle with them again in the morning was a major negative for me.
I find the swag, made up with the pillow and sleeping bag up on the roof much easier to deal with even when used in conjunction with a tent. Just undoing the clips and throwing the swag down inside the tent saves heaps of set up and pack up time. Also the quality of the mattress is so much better than the self inflaters.
Just my thoughts. I am biased as I usually sleep in my swag instead of the KK when we go away as a family.
Jas