What defines a "larger outfit"?

bohenny

Le Point du Jour N03 is very convenient for the Caen ferry , but the road entrance is confusing and the access roads to pitches quite tight especially on the corners.  The arrows painted on the entrance road suggest that you enter to the right of a central
reservation, but that central area is parked up with cars along it which meant we couldn't turn into the barrier which is on the left and had to unhitch. The outfit behind us reversed out onto the main road and came in on the left side. If they didn't allow
parked cars down the middle it would have been fine. 

The entry in the guide says Access for larger outfits requires care.  What is a larger outfit in terms of metres exactly?!   our caravan is 7.4m long single axle