Take the M2/A2 from the M25, following signs for Canterbury initially. Follow the road into Dover as far as the Whitfield Roundabout, near an Esso petrol station and a McDonalds. Take the 4th exit at the roundabout (Whitfield Hill). At the bottom of the hill turn left at the roundabout and at the first set of traffic lights turn right (180 degrees down the hill). Follow the road under the railway bridge and the ground is a few hundred yards further on.
Nearest station is Kearnsey (BR). Upon exiting the station turn right, go under the railway bridge and take the first right (Lower Road). At the end of the road turn right and you should see the ground.