I love warren farm in brean, they have their own play house for the kids plus a club house with family disco's in the evening, you can walk to the beach, there is also a funfair in walking distance as well as a pontins I haven't been to the pontins but believe they have indoor pools etc
I live in brum & its only a couple of hours away, years ago we use to go down on a motorbike & sidecar with a couple of friends on solo bikes all the campsites turned their noses at us coz we were 'bikers' but warren farm never did so we've gone there ever since. So I may be bias but my kids enjoy it.
http://www.warren-farm.co.uk/