Sandringham Estate caravan park (closed)

We are visiting Sandringham on Sunday for 4 nights,  this will only be our 5th trip, as we have only been caravan owners since September and love it,   we have been to Ferry meadows 3 times, which we love, (there full for next week ) so we choose Sandringham,, just looked at weather forcsst and gusts of up to 45mph on Monday, so I think no awning up till they have blown over! ,,,do they have the aerial connections in the posts with the electric ? , any recommendations to where to pitch ( tv signal, 5 year old ) also to what to do while we are there, we have a 5 year old and 2 dogs, I also like running and in training for the London Marathon, so need to keep up with my runs while we are there ( 7 mile routes )