Hi Phil
The best holiday park for families with children close to Weston Super Mud has to be
Holiday Resort Unity, Brean Sands which is about a 20 minute car journey from Weston.
It's not the cheapest site, but there is lots for all the family to do whatever the weather and the youngsters can join the on site kids club where they can be entertained all day and for the early part of the evening if you wish. Apart from the kids club there is swimming, bowling, horse riding, cycle and pedal cart hire, golf fishing as well as family entertainment in the evening, all on the site.
The adjacent funfair is accessible from the site via a foot tunnel under the road so there is no danger from traffic.
The site has good modern clean shower blocks with private family showers and the site is very large with 16amp ehu and hardstandings available.