They are believed to have appeared on Barlow Park Playing Fields in Astley Bridge at some point over the course of Saturday August.
As of Sunday morning, a group of caravans and cars were still parked on the playing fields, which are a popular destination for families, football teams and dog walkers.
Cllr John Walsh, of Astley Bridge, said: “I got a call at about 5.30pm on Saturday afternoon saying that a group of Travellers had…