Thanks for the replies, with 4 kids, 6 chairs do take up a bit of space, I guess the question is do you then just end up taking more other stuff though. The weight saving at maybe 15kg (for a family) is likely only going to be a fraction of a percent of the overall car+camper weight so I don't think for me that would be a massive consideration for me, but space in the car, especially when doing day trips would be a bigger factor and make taking them a lot easier.