Fresh Water Solutions

Stayed on lots of Racecourse sites, in fact prefer them to be honest. Wincanton is a sad loss. Never been to likes of Donnington Park, Mallory etc.... so not sure of what goes on there

Waste points are not a pet hate, we cope fine anywhere with a hosepipe and a bucket, but others may prefer/require  something different. Club Site options are not usually the easiest, either in terms of location or manual handling requirements.

OH has done a lot of motor racing and I thought the OP meant race tracks where you need to be pretty self sufficient. There are usually good wash blocks nearby.

I remember years ago Folkstone racecourse ( now i understand going to  have 12000 houses built where it was)we were told "just open your waste tank tap as you leave 

My thoughts as well brue, rather than staying on horse racing courses. Hopefully OP can tell us a bit more, lots of folks stay at motor racing events. 

We used to use the Trax sites, Hexham, Wetherby etc... Hexham still has a nice campsite, both vans and tents. Women's facilities were ok, but men's were not so good.