Yes, there are thousands of Roma gypsies in the US...they don't drive wagons anymore so I can see why so many people are so easily lulled into complacency...!
Travellers are a seriously private group of Irish descent who live here and do very similar scams as the Gypsies...but they aren't Roma, they're Irish.
"There are about 20,000 Romani Americans (Roma) in Texas, out of a national population of about one million. Romani people, commonly known as Gypsies, have been in the Americas since 1498, when Columbus brought some on his third voyage to the West Indies."