I’m another who’d recommend Centre Parcs for this sort of family holiday. We did as a previous poster, had one super duper villa there with its own sauna, games room, parking and hot tub, and a couple of standard lodges nearby, then we could all share the facilities. Lots to do for everyone, together or separately, and we all got together for evening meals, sharing the cooking or eating out. It was great. But.... I’ve just looked at prices with a view to doing it again next year, and the cost in school holidays is at least double what we paid. We’ve all shared a big holiday home as well, but it was very near interesting towns and sights as well as beaches. Lounging about by a pool or on a beach for a week would drive me mad with boredom. As for booking two holidays - apart from the cost, doesn’t that go against the whole idea of a family holiday?