CL site Alnwick , Northumberland.

Depends if you are set on a five van site but we stayed at Low Hedgeley Farm CL which is at Powburn, ten miles from Alnwick.

It's a bit of a misnomer as the oblong field has six marked hardstanding pitches, then a fence with some shrubs planted along it with a gate marked ‘Private’, followed by four more grass pitches. There is one immaculate toilet for all ten pitches. Normally I am a stickler for five vans only but the reviews of the site were so good and it was exactly where we wanted to be so we chanced it. The private part is all grass, very well mown but on a very slight slope. Water is connected to all the pitches which are well spaced out, and you are told to pour your grey waste in the hedge. The elsan emptying point with the dustbins is next to the toilet at the bottom of the site and is well maintained. There are excellent views from the top end of the site with a good selection of birds visiting the bird feeder.

I would also go along with the above cl.

We stayed at the club site in Powburn a few weeks ago and the cl is just off the main road. The A697 is a quiter road than the A1 and not as hilly as the A68. The stretch from Morpeth to Powburn is ok for towing

 Might not be far South enough for you, but there is a nice CL at Beal, a couple of miles off A1. Brock Mill Farm. It is a mile to causeway across to Lindisfarne, a great day out if you get the tides right! There will be a bit of train noise, it is quite close to main line, but nothing like the Club Site at Berwick which has them practically running through awnings!

If you fancy an adults only site, the Chain Bridge Camping and Caravanning site just outside Berwick is superb.

Another site worth considering if you're willing to stay around Berwick is the ex CL at Paxton House, which is now a 15 van site but has no toilet facilities on site. 

http://paxtonhousecaravanpark.co.uk/

 hi the rugby ground  at Alnwick is a caravan site. there are toilets,  showers  and electric hook ups, it is just off the A1. Just ring the number of the ground or just turn up.

Hope that helps

Michelle