This last weekend I drove me, the wife, three kids (10, 8 and 3 weeks) to my mums for her birthday. We had everything for the weekend including buggy, sizeable moses basket, breast pumps, cloths, kids toys, birthday presents etc in the MK6 with room to spare.
The only squeeze was the two booster seats in the rears with the babyseat in the middle, apart from that we were laughing. Can't see why you're struggling there fella? I had an A4 Avant, you couldn't get any more in there......