I have only had experience with travellers who chose to give up their day to day existance to environmental issues, often turning up at sites of special scientific or natural interest to protest against road expansion, "development" and/or fracking. They are all thinking conscientious people who have given up jobs and "normal" lifestyles to do this. They try as much as they can to not leave a trace where they stop, down to small details like making sure their dogs' *** are buried and taking their rubbish to recycling places. I have a great respect for them, they are truly devoted people who have the best interests of people, plants, animals and the planet at heart.