We camped at quite a few of the sites mentioned and have to agree Little Cotton, Lincoln Park and Tanner Farm are excellent. I would also like to recommend Old Oaks at Glastonbury.
its got to be townsend near leominster, stunning facilities all with powershowers and spotless and above all the facility is heated ! never had to wait for a shower ! 5* in my opinion i love the place ! you have to go great site.