F.A.O. Nellie or anyone else.
Nellie I'm sure you are a member of the other club and I'm also sure the site we are on at the moment would interest you if you haven't already been although there's a big chance you have 
It is Cwmcuttan at Cynghordy, near Llandovery.
All H/S, 16a EHU, free good speed wifi, phone signal, plenty of space, friendly owners, 5 minutes walk from the Halt on the Heart of Wales line, pond on site with carp hence adult only, dog walk and no traffic noise whatsoever. The only noise is birdsong and the 8 trains a day on the line passing the C.S.
Downside for some, but not us, no TV signal unless you have satellite and no shower block.
When we arrived there was only one pitch available and for us it was the best one to suit us with the elderly dog and needing to get to the walk quick.
The cost is £12 pn. Hopefully we might be able to squeeze another week in during this season.