South England with 11 and 9 year old in August

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Hi, I hope you can help me with suggestions.
My husband and I have just looked at our finances and we will stay in the UK this summer.
We are looking for a place where to go with out 2 boys aged 11 and 9. Ideally near the beach with swimming pools. Like an holiday park but not butlins or center park. Or anything similar.

But we are open to any idea.
Do you have any suggestions?

Thanks

Hoburne, Park Dean or Haven. We've booked Warmwell this year. Yet to go though.

We had a fabulous holiday at Torridge House Cottages two years ago.

Rockley Park in Poole? Loads to do in the area.

New forest?

Thanks