Police have praised behaviour during the first four days of the Beach Break festival at Pembrey.
Officers say the vast majority of the 12,500 students attending have been in good spirits and well behaved.
Carmarthenshire council said noise levels from the country park were well within agreed limits.
Seven people have been arrested - two for drugs offences, three for theft and two for public order offences. Five of them were local.
The festival, aimed exclusively at students and headlined by Vampire Weekend and Calvin Harris, ends on Friday.
Concerns were raised by some residents in Burry Port and Pembrey about potential trouble.
Chief Inspector Mark Bleasdale of Dyfed-Powys Police said he had been impressed with the behaviour of most of those camping in the country park.
"There are around 13,000 people at this event, which would roughly equate to a town the size of Carmarthen," he said.
"To therefore have had only seven arrests in three days is a sign not only that the policing operation is proving successful, but also that the overwhelming majority of the event-goers are just out to enjoy themselves
Carmarthenshire council's executive board member for leisure, Clive Scourfield, has visited the site.
He said: "I was at the festival and saw the students having a wonderful time in a fantastic setting.
"I think there are probably more problems in Llanelli on a Saturday night than there are at this festival.
"We are very excited at the success of the event with students from Australia to Swansea enjoying this wonderful venue."