Hi Mike. We have been going to L'Estartit for about 7 yrs now, we dont use Castel MG but the site we do use is in sight of it (Camping Les Medes}. We have had good reports from it, its maybe a bit too 'organised' for us but seems great for kids!. It seems to have lots of activities, is conviently sited, runs its own bus to the town/beach. It is on a quite steep slope but the pitches are terraced, I'd say that if you were at the back (top) if the site it could be a long walk back to your unit after 'dinner' We will be back there (Les Medes) this yr for most of July, hasta la vista,
JimF