Been a while since I was on Houx but from memory things are a bit sparse on the track side of the site but down the road side there's either a tap or electric post every other roadway, so tabs every 4 roads.
Of course that was back in the days of the wall, not the current fence!
Yo! what are the electric hook up points like, haven't been in there in a few years and believe they are all the blue female camping type ones now ? is that the case and is there many of them about?
Traditionally "What's the connection on the 'wall'?" is only a concern if you're arriving before Tuesday. After that just bring a France/UK adaptor plug and you can daisy-chain off of the closest either UK or French multi-block, that ultimately daisy-chains off of a 'wall' socket