Shortly after buying our site we had a visit from a fire officer who was carrying out an inspection as part of our site licensing review.One can normally choose. It's never an issue.
Whilst not mandating it, he advised we should always ask caravans to park tow ball facing outwards. His reasoning was that in an emergency requiring some sort of evacuation (fire, flood or whatever) on many pitches it was impossible to hitch up and drive forwards without hitting trees, campers or other obstructions.
Good advice so that’s what we did. Some people didn’t like it, so we explained why we did it. Anyone who still didn’t like it was given the option of leaving with a full refund. I can count the leavers on one hand.