I'm in basically the same situation as you Tjaard, in planning some 3-season trips with my young kids, 6 & 4 – aiming for 3 nights. They've done plenty of car camping and are very comfortable being out, so I'm pretty certain they'll be fine in whatever shelter we decide on.
For shelter, at this point, we're fairly settled on using two tarptents, a DR for my wife and me, and a Contrail for the kids. They're small and fit and sleep well in it – I trimmed up some cheap CCF pads to fit them perfectly.
These can be set up somewhat complimentary, with the vestibule area of the Contrail pointing into one vestibule/door of the DR. We'll set up a piece of polycro between the doors of the two shelters to basically have an area we can stand without shoes.
@ 4lb, this combo offers better flexibility and long-term value than a Hogback, for instance.
For packing, obviously the grown-ups will be shouldering 99% of the load, so no major considerations there other than using largeish packs (Circuit and REI Flash 65). With your kids being a bit older, perhaps they will do a little bit more of the carrying.
For cooking, the Snow Peak Ti multi-compact cookset is very nice – 4 pieces @ < 11oz. We might leave the smaller pot + lid at home saving 5 oz or so and simply take turns eating. Most likely we'll use a canister stove for simplicity's sake.
Anyway, these are some of my thoughts on this. Granted it's not the direct personal experience you requested, just hoping to validate some of my thinking and hopefully make a useful suggestion or two based on my planning.