Hi Isabel,
If you mean the Caravan Club site at Gwithian it is fantastic. Very well kept, large pitches, Clean, very friendly wardens and a good play area for children. Its close to the dunes and about 3/4 mile from the beach, we go ther about four times a year and are off there for 2 more weeks on Friday of this week. There are also a couple of commercial sites in the village of Gwithian (maybe you mean one of them?) they are very busy with tents, campers and caravans, especially at this time of year (make hay while the sun shines, although there really hasnt been much sun here for this summer)
Gwithian has a huge beach that can be accessed across the dunes. The only downside is Dog Poo! It really is everywhere! It would be lovely to be able to go for a walk and enjoy the sea views, but you cant take your eyes off the footpaths because of the poo everywhere! We went there for a walk on Sunday and both our 5 and 7 year olds came away with shoes covered in the stuff! a Real shame that people think it's OK not to clear up because its an open space.
If you can live with the Poo it's a fantastic area and a very well kept site!