Went to Les Eaux last year, lovely site, good indoor pool complex - esp 4 kids as the sun doesnt always shine in Normandy! - local beach was a fantastic for cockles and rock pools, Granville a lovely v. french town and excellent base for visit to Mont St Michelle, nearby intermarche a good bet for wine and bbq food etc. You will need a car to get anywhere though, beach 2 miles (down hill) and granville 3 miles.
Mike