We are staying at Los Alcazeres in a free carpark by the park, Quite a few motorhomes staying here, it's 5 minute bike ride to the beach.
There is a camping car area Narejod next door that offers full service for €5 or it's 11.90 PN for the first 3 nights, then it drops to €7.90 a night, electric is metered. There are a number of pitches that don't have ehu.
There are also another site next door, called Eco Area Los Alcazeras which is €10 a night and benefits from having water and grey drainage on each pitch.
We stayed on this site when it first opened in 2019, you need to like airplanes though as it's next to a Spanish military airbase, they train there pilots here, plus there display team, so you see a free airshow, only seems to be between 9.00am and 5.00pm.
We went on the scooter to another camper site close by called LA Ribera that had been recommended, we had something to eat in there cafe/bar, the food was excellent and cheap, so we're the drinks, no wonder it was full, a Lidl and Aldi are 5 minutes walk away and there is a cycle path to the beach that is 5km away and they have autogas tank there to refill your LPG. I have taken photos of the pitches and prices.