Site rules are quite clear that one way systems and speed limits apply to ALL, including children. I am not sure that children should play on roads anyway. 

I have just returned too, our holiday was spoilt by the constant noice of scoters and small children on bikes with stabilisers. We had a 10 year old with us and we spent out evenings together. Fed up of these people that kick their kids out at 8am leaving the to go round in circles until gone 9 at night. I wish the wardens had done more. Entertain your children, you will soon moan when 1 is hit by a car 

It's clear that unruly kids are the issue, not a safe and sensible speed limit and one way system on a road. 

It's as if Monks 0504 and hja et al were never children themselves. Complaining about children playing on a campsite...dear me. The reviewer already stated that one of his/her children is neurodiverse and yet you expect that child to know and obey the rules about speed limits (on scooters!) and the one way system......Unruly kids?? What playing on their scooters on the campsite road? Incredible. The noise of small children on bikes with stabilisers disturbed you? Very sad.

Just because their kids they still have to abide by highway code & if the child is autistic even more reason why grandparents & parents should be outside supervising them to insure their safety as they don’t all understand danger everyone wants to enjoy their holidays & relax kids still need discipline & boundaries always a few parents grandparents that can’t be bothered & send kids out at crack of dawn to annoy everyone else until it’s gone dark so their not under their feet annoying them try paying kids attention & spending time teaching them & showing them things of interest feel sorry for the kids