For luxury showers you can't beat Red Shoot in the New Forest. They have slate floors with underfloor heating
We stayed at Kelling Heath last year and liked it. It's very big and professional looking but also very close to nature. It's big enough that you can avoid the village centre bit in the summer if entertainment etc isn't your thing.
We are a family of 4 ds are 4 and 7.We usually go to Clippesby Hall in Norfolk which we love but we fancy trying somewhere new this year. Dh insists on EHU. I insist on clean shower blocks. Somewhere nice to eat would be great and safe for the boys and things to do on site.I also love the noise curfew so we aren't kept awake till the small hours by noisy neighbours (just jealous as we are up at 6.30). Any ideas?