caravan pitches??

hi all

as you may have read in a previous post of mine i have recently aquired a caravan & camping site in stalham norfork. at present we have 12 static vans, 30 touring pitches & space for upto 30 tents.

we are in the process of updating the facilitys ie. new toilets/showers/clubhouse/swimmingpool & touring pitches.

at present the touring pitches are all on grass & no electric hook up?
the caravaners amongst you may be able to help with a couple of questions i have to ask?

1 would you rather have you van sit on a grass pitch or concrete? if concrete what length/width are most vans?

2 electric hook up or not? if electric hook up what sort of plug to connect to & what is the current rating of caravans?

you help with these questions will help us to make up our mines whether to go ahead with the planned works of leave the pitches as they are

thanks in advance

gary