Can you help me to plan a UK break?

[VillageFete]

Hi,

I’m looking for a UK break (Not Cornwall) That is hopefully near to a harbour/beach. Don’t want to camp but maybe somewhere that has a camp site/caravan site vibe with entertainment and places to eat etc

3 children with us, youngest being a toddler so needs to cater for children but be a nice break in the summer for adults too.

We love Ribby Hall but looking for somewhere different.

Happy to fly if needed. We are in the North West.

Bluestone
Whitecross Bay in the lake district has access to lake windermere.
Kielder Holiday Lodges but can be "buggy" in the summer.
Crieff Hydro or Peebles Hydro but neither are near water.
I know you've said UK but also said willing to fly so maybe look at Centre Parcs in Europe - their schools usually go back before English ones so can be a lot cheaper.