A great site for your children is Cambrils Park www.cambrilspark.es/en/ near to Salou in Spain. It's a big site, but divided up nicely, with good grassy pitches, and plenty of shade. Great pool complexes, one each end of the site, with an area set aside for children with squirting fountains in the form of life size elephants. Lovely bar, restaurant, take-away, supermarket, walking distance to the beach, and excellent toilet facilities. There's Port Aventura on the doorstep, too, other aqua parks (though the pools are so good you shouldn't need one) and lots of other things to keep you busy.