You are being influenced by the promotion of negative stereotypes.
No; I am influenced by what happened very near my home, in the summer of 2019 as one specific example.
This is a small patch of grassed area (roughly 40 x 100 yds; I've just had a look on Google Maps), bounded on two sides by the houses on my road, the road itself, and the rear of some shops at the far side.
A number of crew cabs, 4 x 4s, large caravans and the like turned up.
Pulled the posts out of the ground, to gain access.
Loud music till all hours, fires, hanging their washing from the neighbouring houses' fences and trees, shoite and rubbish everywhere.
Blocked the road when they felt like driving anywhere.
Miserable for those bounding the area, for a few weeks until they went.
I did not feel I had been enriched in any way.
Fair's fair though, we have also (twice, in the last year) been visited by traditional travellers, with horses, wooden carriages, and the like.
Apart from the grass being eaten bare by their tied-up horses, no bother at all.