Pembrokeshire National Park woodland officer Celia Thomas said the authority had been contacted by some members of the public concerned that felling trees would detract from the character of the ancient oak woodland.
"They started coming in a few at a time, " said Julio Cesar Fonseca Rivero, the director of the Celia Sanchez Manduley Hospital, the largest in the region.
Celia Chen, founder of Notes on a Party, an online magazine about entertaining, said hosts are often now asking guests to refrain from posting photos and sharing details of parties.