Cyclocross - CX and SSCX races and training

Hmmmmm. Who does this?!

2 bikes (at least)
A petrol jet wash
Several barrels or wheelie bins of water (roughly 150 Litres per rider)
A trolley to carry the water and/or jet wash
A stand to put the bike on whilst jet washing
A van (at least, more commonplace now, a motorhome) to put it all in

Actually, there were one or two of these at SuperCross race we attended last year. But just one or two.