Is the Otago Conservation Board right to want to ban campervans?

I travel all over NZ and over recent years DOC has removed many picnic/camping areas which also had toilets and rubbish collection.
Travel from Wanaka to Haast and watch all those in cars who have left their accommadation.They stop behind bushes when nature calls because the toilets are no longer available. I remember several areas right on the roadside that encouraged one to stop and use the toilets at picnic areas. Most are gone now so of course problems arise. As well, many councils are committed to zero waste and have been cleverly removing rubbish bins in their area so they can say they are saving money and are getting greener.
We also have seen truck drivers,couriers and other contractors attend to calls of nature out in our "Clean Green NZ" countryside. Surely they should at least be seen trotting off with a trowel in hand as good kiwi trampers were taught to do.
I think the provision of long drops in rest areas at better intervals would help the problem. Perhaps even a campaign allied to the servicestations would assist too. Free small rubbish bags could be dished out to travellers so they could pop them into the next service station they visit.(Many provide dump sites and free rubbish collection for vehicles alongside their other services).
Dont blame it all on the campervans, as many others travel and enjoy our beautiful country.

Why ban campervans? If the only problem is the defecating in the bush and leaving rubbish behind then shouldn't the Otago Conservation Board or some appropriate local body build some toilets and supply some rubbish tins? The problem is so simple to fix. All that is needed is some 44 gallon drums, timber, roofing iron and a bit of imagination.

I am all for supporting the ban of campervans. In my experience, as a surfer living on the South Otago coast, I frequently surf at many obscure breaks along the coast from Blackhead to Taieri Mouth. This area is a breeding ground for freedom campers, who park up and camp in the laybys by these surf breaks where they defaecate there, and leave their rubbish.

It is disgusting to be getting changed into my wetti and step back into human faeces,and be surrounded by their stinking rubbish. I have watched many leave their vans in the morning and squat in the bushes, or drive off with tied bags of rubbish thrown in the dunes.