Hi Kazzar and welcome to the forum

Can't help you with a camp site but there is soo much to do in Norfolk that I dont think you can go far wrong. I guess with young people too you might want to go to one of the busier areas but I always love visiting the north coast around Blakeney, Holkham (for the beach) etc. There are some ladies on here from the area so I am sure you will get lots of replies.