I have spoken with the people there earlier this year.
They were very friendly and they were happy to accommodate us on the Harleys with tents but there are only 12 pitches and it is aimed at Airstreams and "retro vehicules" (sic) so they may not welcome the more modern "Euro Camping Cars" - RVs should be OK though!!
Copied from their website
"Belrepayre Airstream & Retro campsite is away from it all, so you can be sure for a secure and peaceful stay.
A choice of spacious grass flat pitches with water tap and electricity, Hot solar water in the wash room.
Space for car parking and outlet plugins on each pitch :
12 large pitches of 100m2 minimum, in a landscape garden. Prices
Exclusively for Airstreams, vintage caravans and retro vehicules"
Having said that one of the photos of the site shows what appears to be a Routemaster - I'm sure a bus expert will correct me - and a couple of "regular" camper vans plus an enormous "Airstream inspired" RV.