Can't speak for the CC but the C&CC we've never had an issue with either of our RVs we've had, mind you even now we're not exaclty huge at 28 ft, even the odd occations we've had a car with us, in fact on one of the rare occations I said we'll leave it in the car park and the managers said no, politley, put it on you pitch, it's exactly the same as a caravaner having their car on pitch, mind you they we're (Euro) motorhomers.
I noticed recently 5vers have been added to the booking options on line and at a site they had a sheet on the wall detailing pitch sutability, ie what could go where and RV (American motorhomes) and 5vers were clearly listed.
Quite a few we've been on have suitable black dump and a couple have had upgrades that now also have suitable black.
I think some are just unlucky were they go
I noticed recently 5vers have been added to the booking options on line and at a site they had a sheet on the wall detailing pitch sutability, ie what could go where and RV (American motorhomes) and 5vers were clearly listed.
Quite a few we've been on have suitable black dump and a couple have had upgrades that now also have suitable black.
I think some are just unlucky were they go