I decided last night to try and work out mathematically the chances of bottoming out the caravan, and removing the rear panel, as the head of The Caravan Club did in that wonderfull program a couple of years ago.
I then realised I needed the dimensions of the caravan, distance from the rear axle to the tow ball, distance from the tow hitch to front and rear axles of the caravan, and most importantly the incline angle of the driveway.
I then decided to concentrate on which cheese went better with a nice Rioja, chedder, stilton, or a delicate goats cheese. A much better result.