After going through the gates onto the driveway to the site we saw an extremely large American style outfit about to make a late departure at the far end. We indicated that they shouldn't proceed as we were already part the way along. They ignored our warning and continued regardless, forcing us to go onto the verge at the side of the driveway. We discovered that the verge was very wet and boggy and unfortunately left a tyre mark. We were just siting our caravan on the pitch when the site owner appeared and berated us in no uncertain terms for marking the grass before we had time to explain what had happened. We found the situation highly embarrassing and considered leaving. The following are some suggestions for the site owner: 1) Ascertain the facts before commenting. 2) Ensure pitches are vacated before the 12 noon cut off. 3) Only open the site during the drier months to preserve the grass.