Travellers have set up camp at a site in Camberley which faced a similar incursion two years ago.
Vans and caravans were parked up overnight at Heatherside Recreation Ground having reportedly come along Red Road and The Maultway from the Chobham direction.
A local residents group has bitterly referred back to a "woefully inadequate response" from Surrey Heath Borough Council to the previous encampment in July 2013.
Posting on Twitter on Sunday lunchtime, one resident said: "Police are now on scene, and caravans are rolling in from both sides of the park. Looks like they had this well organised."
Writing on the Heatherside Residents' Forum Facebook page, Graham Tapper said: "We are once again experiencing a distressing situation that we had hoped we would avoid after the pressure we put upon the council to address the obvious weaknesses in the security of our recreation ground that were exposed a couple of years ago.
"However, what has happened is a situation that is not going to be remedied overnight. I realise that emotions are inflamed by the activities that have taken place.
"As has been explained, this is an issue that must be addressed by the council.
"They have to take the necessary steps to secure legal support to remove the travellers from occupying our community resource. It will happen, as it did last time, but it will take time.
"What we need to do is to ensure that the council accepts their woefully inadequate response to the previous, and now this, incursion and to ensure that they take appropriate action this time to ensure there is no repetition."
Councillor Paul Deach, borough council member for Mytchett and Deepcut said: "I am receiving a huge amount of communication from local residents concerning the gypsy/traveller incursion on the Heatherside Recreation Ground.
"The police are aware and have attended the site.
"Although I have not spoken to the police, going on previous occurrences I am certain that they will be monitoring the situation closely and will be carrying out reassurance patrols in the area.
"There is a process to go through before the authorities can legally ask the gypsy/traveller community concerned to leave the site.
"The fact the police have attended the site is in itself an indication that that process has already begun, however it can take several days for them to leave.
"Could I urge members of the community to be tolerant and not make the work of the police more difficult by inflaming the situation."