I spent decades of working with Travellers all day, every day, and also with the settled community, so I speak from a lot of experience.
For about the first 15 years I just knew Gypsy/Romas. but latterly also with Irish.
What I know is that you can't generalise - but for the sake of this thread I will draw some conclusions:
The first is that I had a great deal of respect shown to me. Once I became known in the community I was trusted, supported and shown great affection. (I recently bumped into an ex-pupil who was with her auntie, at the hospital, and they made a huge fuss of me). In return I felt and showed respect for them.
I never had a single item stolen from me. I would happily leave my handbag in the room when I went off to get something, and had no doubts about doing so.
The boys were more prone to settle a difference with fists. This could be a problem - although it did mean that squabbles were "sorted" quickly :!
The community had a 50's style moral code, to loosely describe it. The men provided, the women cleaned and shopped. Sex was not spoken of, brides were virgins, men and women socialised separately. Careers for women were not the norm. This took me some time to accept.
Trailers were immaculate; in fact too immaculate, as I have slithered and stuck to the plastic covers protecting the upholstery! I have never visited a Gypsy house, but I believe them to be the same.
A fair number of Travellers view settled, or country folk with some suspicion or prejudice. Some believe that lax morals and drug-taking are rife in the settled. Most prefer their children to marry within the community.
To sum it up, I look back with happy memories to my time with this colourful, emotionally honest and interesting bunch of folks.