I have had a contact from Landsdownecamping.org.uk . I personally have not visited this site, nor do I know the area , thus am unable to make an individual recommendation. However, for anyone in the Southport area, perhaps you could advise other members and if you feel you need to the matters further then please liaise with Mr Tyson.
Our site is a Camping and caravanning Club Certificated Site (hence CS).
However, the rally field is completely separate.
The ground is flat, usually dry, and not prone to flooding.
There are a number of available water taps, an Elsan tank for loo emptying and one electric hook up.
We are near Southport , a N.W. seaside resort and there is a regular bus service which passes our gate-Southport to Preston.
Fishing and canoeing on site.
For more info please see our basic website: www.landsdownecamping.org.uk
WE charge clubs £7-50/ unit night and we are not VAT registered.
I hope this helps a bit and would welcome a visit from yourselves or members.