Can echo the comments about Vauxhall,an excellent site-near an asda,loads on the park,clean and ideally placed for Yarmouth and surrounding area.
We've also stayed at Seales site at Hunstanton,which is close to Sandringham and Cromer.Also perfectly placed on the front,near a tesco and amusements.Very good site but can get quite crowded,especially round the bar!
Have fun!We love Norfolk!!