Hi Pugsley, sorry but I can't help with camp sites, and to be honest I would not recommend GY to anybody, especially at easter. Can tend to be a bit errr pykeish. And any decent ride out would only take you back across country towards home.
Why not base yourself at, lets say the Huntstanton area. You could then have a slow bimble around the north Norfok coast line to GY. cut inland and
run through Beccles, Bungay, Harleston, Diss, Thetford, Watton, East Dereham, Fakenham, Docking and back to your base.
Terrible roads though, its all tractors, mud and slippy slimey roads. :aug
Don't belive a word that that Engineer chappie says either.