I'm sure there is enough forward thinking to put in distribution boxes that could be used by the festival.

I recall a similar thing was done at the Ham recently, thus no more need for on-site diesel generators.

Even a normal 'domestic' single phase supply is 100 amps (maximum 24 kW), if they put in three phase, someone would have to pay the extra??

For sheer luxury, how about some hook up points for caravans and charge a premium rate? It could become a Caravan Club CL too!