Here's a novel idea. Treat gypsies/travellers the way you would treat any other person. If you think they are being anti-social, complain to the LA; complain to the noise abatement officer; complain to the environmental health; complain to the police. And if, after all those complaints, nothing changes then consider that maybe, just maybe, they actually aren't breaking the law and that your intolerance of their behaviour is being exacerbated by your bigotry.
Ahh see this ^^ is not my experience.
When they're being anti-social, many of us complain to all of those people/departments.
Numerous enquiries are made, evidence is gathered, the long and expensive eviction process is started. The travellers are eventually evicted, the expensive clean up operation starts - rarely a bigot in sight in my experience.
Then a couple of months passes (if that long) and the entire thing starts again and again and again....
Like I said, I've had 20 years of this due to the parks/playing fields/nature reserve and cemetery, being constantly camped on.
Even the old B&Q carpark had to put a height restriction thing in place to stop the caravans arriving, until it was torn down and they arrived again anyway.