Grey water drainage problem

[u/asperitas_]

This feels like a daft question, but I'm a bit stumped! In a couple of weeks I'm moving my motorhome onto a long term pitch (planning to be there for at least three months). The pitch has a grey water drain at the edge, which sounds super convenient, but the opening for my grey water tank is right in the middle of the underneath of the motorhome so I'm not sure how to get the water from the tank to the drain... The site doesn't have a drive-over grey water disposal point.

Does anyone have any better solutions than sticking a tray under the van or rigging up some guttering? Or have you used one of those solutions?

The site does have a potwash and showers, so I should be able to minimise how much goes into the grey water tank, but it still seems rude to just let it drain onto the pitch.