Hi Clive, we went to Northumberland for the first time a couple of weeks ago. We normally only use CC sites but Seaview was full(and it`s not in a nice place anyway) so we stayed at East Ord Country Park in Berwick, and was quite impressed. Good clean facilities,we got a `superpitch` without asking, small bar & restaurant on site, small shop just outside the gates and a cracking local country pub doing good food and real ale less than five minutes walk away. It`s also easy to get to, so you can quickly get to Berwick, Bamburgh,Lindisfarne etc. They also have a website.
Wherever you end up, enjoy it. We did and willbe going back to see some more.