Not quite sure what you mean by the first question but lots of areas do rallies there.
The site is on the side of a hill and the touring fields are either up or down the hill.
I believe the bottom field may be closed now, going from the top field to the centre is appx 300 yds and involves some very light slopes with the steepest bit (1:10ish) being right next to the centre.
There is a level car park opposite the front door of the centre.
If you have trouble walking I would not suggest walking to the beach.